diff options
Diffstat (limited to 'arch/m68k/platform/68360')
| -rw-r--r-- | arch/m68k/platform/68360/Makefile | 10 | ||||
| -rw-r--r-- | arch/m68k/platform/68360/commproc.c | 308 | ||||
| -rw-r--r-- | arch/m68k/platform/68360/config.c | 186 | ||||
| -rw-r--r-- | arch/m68k/platform/68360/entry.S | 184 | ||||
| -rw-r--r-- | arch/m68k/platform/68360/head-ram.S | 403 | ||||
| -rw-r--r-- | arch/m68k/platform/68360/head-rom.S | 414 | ||||
| -rw-r--r-- | arch/m68k/platform/68360/ints.c | 139 |
7 files changed, 1644 insertions, 0 deletions
diff --git a/arch/m68k/platform/68360/Makefile b/arch/m68k/platform/68360/Makefile new file mode 100644 index 000000000000..cf5af73a5789 --- /dev/null +++ b/arch/m68k/platform/68360/Makefile @@ -0,0 +1,10 @@ +# +# Makefile for arch/m68knommu/platform/68360. +# + +obj-y := config.o commproc.o entry.o ints.o + +extra-y := head.o + +$(obj)/head.o: $(obj)/head-$(MODEL).o + ln -sf head-$(MODEL).o $(obj)/head.o diff --git a/arch/m68k/platform/68360/commproc.c b/arch/m68k/platform/68360/commproc.c new file mode 100644 index 000000000000..8e4e10cc0080 --- /dev/null +++ b/arch/m68k/platform/68360/commproc.c @@ -0,0 +1,308 @@ +/* + * General Purpose functions for the global management of the + * Communication Processor Module. + * + * Copyright (c) 2000 Michael Leslie <mleslie@lineo.com> + * Copyright (c) 1997 Dan Malek (dmalek@jlc.net) + * + * In addition to the individual control of the communication + * channels, there are a few functions that globally affect the + * communication processor. + * + * Buffer descriptors must be allocated from the dual ported memory + * space. The allocator for that is here. When the communication + * process is reset, we reclaim the memory available. There is + * currently no deallocator for this memory. + * The amount of space available is platform dependent. On the + * MBX, the EPPC software loads additional microcode into the + * communication processor, and uses some of the DP ram for this + * purpose. Current, the first 512 bytes and the last 256 bytes of + * memory are used. Right now I am conservative and only use the + * memory that can never be used for microcode. If there are + * applications that require more DP ram, we can expand the boundaries + * but then we have to be careful of any downloaded microcode. + * + */ + +/* + * Michael Leslie <mleslie@lineo.com> + * adapted Dan Malek's ppc8xx drivers to M68360 + * + */ + +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/param.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <asm/irq.h> +#include <asm/m68360.h> +#include <asm/commproc.h> + +/* #include <asm/page.h> */ +/* #include <asm/pgtable.h> */ +extern void *_quicc_base; +extern unsigned int system_clock; + + +static uint dp_alloc_base; /* Starting offset in DP ram */ +static uint dp_alloc_top; /* Max offset + 1 */ + +#if 0 +static void *host_buffer; /* One page of host buffer */ +static void *host_end; /* end + 1 */ +#endif + +/* struct cpm360_t *cpmp; */ /* Pointer to comm processor space */ + +QUICC *pquicc; +/* QUICC *quicc_dpram; */ /* mleslie - temporary; use extern pquicc elsewhere instead */ + + +/* CPM interrupt vector functions. */ +struct cpm_action { + void (*handler)(void *); + void *dev_id; +}; +static struct cpm_action cpm_vecs[CPMVEC_NR]; +static void cpm_interrupt(int irq, void * dev, struct pt_regs * regs); +static void cpm_error_interrupt(void *); + +/* prototypes: */ +void cpm_install_handler(int vec, void (*handler)(), void *dev_id); +void m360_cpm_reset(void); + + + + +void m360_cpm_reset() +{ +/* pte_t *pte; */ + + pquicc = (struct quicc *)(_quicc_base); /* initialized in crt0_rXm.S */ + + /* Perform a CPM reset. */ + pquicc->cp_cr = (SOFTWARE_RESET | CMD_FLAG); + + /* Wait for CPM to become ready (should be 2 clocks). */ + while (pquicc->cp_cr & CMD_FLAG); + + /* On the recommendation of the 68360 manual, p. 7-60 + * - Set sdma interrupt service mask to 7 + * - Set sdma arbitration ID to 4 + */ + pquicc->sdma_sdcr = 0x0740; + + + /* Claim the DP memory for our use. + */ + dp_alloc_base = CPM_DATAONLY_BASE; + dp_alloc_top = dp_alloc_base + CPM_DATAONLY_SIZE; + + + /* Set the host page for allocation. + */ + /* host_buffer = host_page_addr; */ + /* host_end = host_page_addr + PAGE_SIZE; */ + + /* pte = find_pte(&init_mm, host_page_addr); */ + /* pte_val(*pte) |= _PAGE_NO_CACHE; */ + /* flush_tlb_page(current->mm->mmap, host_buffer); */ + + /* Tell everyone where the comm processor resides. + */ +/* cpmp = (cpm360_t *)commproc; */ +} + + +/* This is called during init_IRQ. We used to do it above, but this + * was too early since init_IRQ was not yet called. + */ +void +cpm_interrupt_init(void) +{ + /* Initialize the CPM interrupt controller. + * NOTE THAT pquicc had better have been initialized! + * reference: MC68360UM p. 7-377 + */ + pquicc->intr_cicr = + (CICR_SCD_SCC4 | CICR_SCC_SCC3 | CICR_SCB_SCC2 | CICR_SCA_SCC1) | + (CPM_INTERRUPT << 13) | + CICR_HP_MASK | + (CPM_VECTOR_BASE << 5) | + CICR_SPS; + + /* mask all CPM interrupts from reaching the cpu32 core: */ + pquicc->intr_cimr = 0; + + + /* mles - If I understand correctly, the 360 just pops over to the CPM + * specific vector, obviating the necessity to vector through the IRQ + * whose priority the CPM is set to. This needs a closer look, though. + */ + + /* Set our interrupt handler with the core CPU. */ +/* if (request_irq(CPM_INTERRUPT, cpm_interrupt, 0, "cpm", NULL) != 0) */ +/* panic("Could not allocate CPM IRQ!"); */ + + /* Install our own error handler. + */ + /* I think we want to hold off on this one for the moment - mles */ + /* cpm_install_handler(CPMVEC_ERROR, cpm_error_interrupt, NULL); */ + + /* master CPM interrupt enable */ + /* pquicc->intr_cicr |= CICR_IEN; */ /* no such animal for 360 */ +} + + + +/* CPM interrupt controller interrupt. +*/ +static void +cpm_interrupt(int irq, void * dev, struct pt_regs * regs) +{ + /* uint vec; */ + + /* mles: Note that this stuff is currently being performed by + * M68360_do_irq(int vec, struct pt_regs *fp), in ../ints.c */ + + /* figure out the vector */ + /* call that vector's handler */ + /* clear the irq's bit in the service register */ + +#if 0 /* old 860 stuff: */ + /* Get the vector by setting the ACK bit and then reading + * the register. + */ + ((volatile immap_t *)IMAP_ADDR)->im_cpic.cpic_civr = 1; + vec = ((volatile immap_t *)IMAP_ADDR)->im_cpic.cpic_civr; + vec >>= 11; + + + if (cpm_vecs[vec].handler != 0) + (*cpm_vecs[vec].handler)(cpm_vecs[vec].dev_id); + else + ((immap_t *)IMAP_ADDR)->im_cpic.cpic_cimr &= ~(1 << vec); + + /* After servicing the interrupt, we have to remove the status + * indicator. + */ + ((immap_t *)IMAP_ADDR)->im_cpic.cpic_cisr |= (1 << vec); +#endif + +} + +/* The CPM can generate the error interrupt when there is a race condition + * between generating and masking interrupts. All we have to do is ACK it + * and return. This is a no-op function so we don't need any special + * tests in the interrupt handler. + */ +static void +cpm_error_interrupt(void *dev) +{ +} + +/* Install a CPM interrupt handler. +*/ +void +cpm_install_handler(int vec, void (*handler)(), void *dev_id) +{ + + request_irq(vec, handler, 0, "timer", dev_id); + +/* if (cpm_vecs[vec].handler != 0) */ +/* printk(KERN_INFO "CPM interrupt %x replacing %x\n", */ +/* (uint)handler, (uint)cpm_vecs[vec].handler); */ +/* cpm_vecs[vec].handler = handler; */ +/* cpm_vecs[vec].dev_id = dev_id; */ + + /* ((immap_t *)IMAP_ADDR)->im_cpic.cpic_cimr |= (1 << vec); */ +/* pquicc->intr_cimr |= (1 << vec); */ + +} + +/* Free a CPM interrupt handler. +*/ +void +cpm_free_handler(int vec) +{ + cpm_vecs[vec].handler = NULL; + cpm_vecs[vec].dev_id = NULL; + /* ((immap_t *)IMAP_ADDR)->im_cpic.cpic_cimr &= ~(1 << vec); */ + pquicc->intr_cimr &= ~(1 << vec); +} + + + + +/* Allocate some memory from the dual ported ram. We may want to + * enforce alignment restrictions, but right now everyone is a good + * citizen. + */ +uint +m360_cpm_dpalloc(uint size) +{ + uint retloc; + + if ((dp_alloc_base + size) >= dp_alloc_top) + return(CPM_DP_NOSPACE); + + retloc = dp_alloc_base; + dp_alloc_base += size; + + return(retloc); +} + + +#if 0 /* mleslie - for now these are simply kmalloc'd */ +/* We also own one page of host buffer space for the allocation of + * UART "fifos" and the like. + */ +uint +m360_cpm_hostalloc(uint size) +{ + uint retloc; + + if ((host_buffer + size) >= host_end) + return(0); + + retloc = host_buffer; + host_buffer += size; + + return(retloc); +} +#endif + + +/* Set a baud rate generator. This needs lots of work. There are + * four BRGs, any of which can be wired to any channel. + * The internal baud rate clock is the system clock divided by 16. + * This assumes the baudrate is 16x oversampled by the uart. + */ +/* #define BRG_INT_CLK (((bd_t *)__res)->bi_intfreq * 1000000) */ +#define BRG_INT_CLK system_clock +#define BRG_UART_CLK (BRG_INT_CLK/16) + +void +m360_cpm_setbrg(uint brg, uint rate) +{ + volatile uint *bp; + + /* This is good enough to get SMCs running..... + */ + /* bp = (uint *)&cpmp->cp_brgc1; */ + bp = (volatile uint *)(&pquicc->brgc[0].l); + bp += brg; + *bp = ((BRG_UART_CLK / rate - 1) << 1) | CPM_BRG_EN; +} + + +/* + * Local variables: + * c-indent-level: 4 + * c-basic-offset: 4 + * tab-width: 4 + * End: + */ diff --git a/arch/m68k/platform/68360/config.c b/arch/m68k/platform/68360/config.c new file mode 100644 index 000000000000..9dd5bca38749 --- /dev/null +++ b/arch/m68k/platform/68360/config.c @@ -0,0 +1,186 @@ +/* + * linux/arch/m68knommu/platform/68360/config.c + * + * Copyright (c) 2000 Michael Leslie <mleslie@lineo.com> + * Copyright (C) 1993 Hamish Macdonald + * Copyright (C) 1999 D. Jeff Dionne <jeff@uclinux.org> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <stdarg.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <linux/irq.h> + +#include <asm/setup.h> +#include <asm/system.h> +#include <asm/pgtable.h> +#include <asm/machdep.h> +#include <asm/m68360.h> + +#ifdef CONFIG_UCQUICC +#include <asm/bootstd.h> +#endif + +extern void m360_cpm_reset(void); + +// Mask to select if the PLL prescaler is enabled. +#define MCU_PREEN ((unsigned short)(0x0001 << 13)) + +#if defined(CONFIG_UCQUICC) +#define OSCILLATOR (unsigned long int)33000000 +#endif + +unsigned long int system_clock; + +extern QUICC *pquicc; + +/* TODO DON"T Hard Code this */ +/* calculate properly using the right PLL and prescaller */ +// unsigned int system_clock = 33000000l; +extern unsigned long int system_clock; //In kernel setup.c + + +static irqreturn_t hw_tick(int irq, void *dummy) +{ + /* Reset Timer1 */ + /* TSTAT &= 0; */ + + pquicc->timer_ter1 = 0x0002; /* clear timer event */ + + return arch_timer_interrupt(irq, dummy); +} + +static struct irqaction m68360_timer_irq = { + .name = "timer", + .flags = IRQF_DISABLED | IRQF_TIMER, + .handler = hw_tick, +}; + +void hw_timer_init(void) +{ + unsigned char prescaler; + unsigned short tgcr_save; + +#if 0 + /* Restart mode, Enable int, 32KHz, Enable timer */ + TCTL = TCTL_OM | TCTL_IRQEN | TCTL_CLKSOURCE_32KHZ | TCTL_TEN; + /* Set prescaler (Divide 32KHz by 32)*/ + TPRER = 31; + /* Set compare register 32Khz / 32 / 10 = 100 */ + TCMP = 10; + + request_irq(IRQ_MACHSPEC | 1, timer_routine, 0, "timer", NULL); +#endif + + /* General purpose quicc timers: MC68360UM p7-20 */ + + /* Set up timer 1 (in [1..4]) to do 100Hz */ + tgcr_save = pquicc->timer_tgcr & 0xfff0; + pquicc->timer_tgcr = tgcr_save; /* stop and reset timer 1 */ + /* pquicc->timer_tgcr |= 0x4444; */ /* halt timers when FREEZE (ie bdm freeze) */ + + prescaler = 8; + pquicc->timer_tmr1 = 0x001a | /* or=1, frr=1, iclk=01b */ + (unsigned short)((prescaler - 1) << 8); + + pquicc->timer_tcn1 = 0x0000; /* initial count */ + /* calculate interval for 100Hz based on the _system_clock: */ + pquicc->timer_trr1 = (system_clock/ prescaler) / HZ; /* reference count */ + + pquicc->timer_ter1 = 0x0003; /* clear timer events */ + + /* enable timer 1 interrupt in CIMR */ + setup_irq(CPMVEC_TIMER1, &m68360_timer_irq); + + /* Start timer 1: */ + tgcr_save = (pquicc->timer_tgcr & 0xfff0) | 0x0001; + pquicc->timer_tgcr = tgcr_save; +} + +void BSP_gettod (int *yearp, int *monp, int *dayp, + int *hourp, int *minp, int *secp) +{ +} + +int BSP_set_clock_mmss(unsigned long nowtime) +{ +#if 0 + short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60; + + tod->second1 = real_seconds / 10; + tod->second2 = real_seconds % 10; + tod->minute1 = real_minutes / 10; + tod->minute2 = real_minutes % 10; +#endif + return 0; +} + +void BSP_reset (void) +{ + local_irq_disable(); + asm volatile ( + "moveal #_start, %a0;\n" + "moveb #0, 0xFFFFF300;\n" + "moveal 0(%a0), %sp;\n" + "moveal 4(%a0), %a0;\n" + "jmp (%a0);\n" + ); +} + +unsigned char *scc1_hwaddr; +static int errno; + +#if defined (CONFIG_UCQUICC) +_bsc0(char *, getserialnum) +_bsc1(unsigned char *, gethwaddr, int, a) +_bsc1(char *, getbenv, char *, a) +#endif + + +void config_BSP(char *command, int len) +{ + unsigned char *p; + + m360_cpm_reset(); + + /* Calculate the real system clock value. */ + { + unsigned int local_pllcr = (unsigned int)(pquicc->sim_pllcr); + if( local_pllcr & MCU_PREEN ) // If the prescaler is dividing by 128 + { + int mf = (int)(pquicc->sim_pllcr & 0x0fff); + system_clock = (OSCILLATOR / 128) * (mf + 1); + } + else + { + int mf = (int)(pquicc->sim_pllcr & 0x0fff); + system_clock = (OSCILLATOR) * (mf + 1); + } + } + + printk(KERN_INFO "\n68360 QUICC support (C) 2000 Lineo Inc.\n"); + +#if defined(CONFIG_UCQUICC) && 0 + printk(KERN_INFO "uCquicc serial string [%s]\n",getserialnum()); + p = scc1_hwaddr = gethwaddr(0); + printk(KERN_INFO "uCquicc hwaddr %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n", + p[0], p[1], p[2], p[3], p[4], p[5]); + + p = getbenv("APPEND"); + if (p) + strcpy(p,command); + else + command[0] = 0; +#else + scc1_hwaddr = "\00\01\02\03\04\05"; +#endif + + mach_gettod = BSP_gettod; + mach_reset = BSP_reset; +} diff --git a/arch/m68k/platform/68360/entry.S b/arch/m68k/platform/68360/entry.S new file mode 100644 index 000000000000..46c1b18c9dcb --- /dev/null +++ b/arch/m68k/platform/68360/entry.S @@ -0,0 +1,184 @@ +/* + * linux/arch/m68knommu/platform/68360/entry.S + * + * Copyright (C) 1991, 1992 Linus Torvalds + * Copyright (C) 2001 SED Systems, a Division of Calian Ltd. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file README.legal in the main directory of this archive + * for more details. + * + * Linux/m68k support by Hamish Macdonald + * M68360 Port by SED Systems, and Lineo. + */ + +#include <linux/sys.h> +#include <linux/linkage.h> +#include <asm/thread_info.h> +#include <asm/unistd.h> +#include <asm/errno.h> +#include <asm/setup.h> +#include <asm/segment.h> +#include <asm/traps.h> +#include <asm/asm-offsets.h> +#include <asm/entry.h> + +.text + +.globl system_call +.globl resume +.globl ret_from_exception +.globl ret_from_signal +.globl sys_call_table +.globl ret_from_interrupt +.globl bad_interrupt +.globl inthandler + +badsys: + movel #-ENOSYS,%sp@(PT_OFF_D0) + jra ret_from_exception + +do_trace: + movel #-ENOSYS,%sp@(PT_OFF_D0) /* needed for strace*/ + subql #4,%sp + SAVE_SWITCH_STACK + jbsr syscall_trace_enter + RESTORE_SWITCH_STACK + addql #4,%sp + movel %sp@(PT_OFF_ORIG_D0),%d1 + movel #-ENOSYS,%d0 + cmpl #NR_syscalls,%d1 + jcc 1f + lsl #2,%d1 + lea sys_call_table, %a0 + jbsr %a0@(%d1) + +1: movel %d0,%sp@(PT_OFF_D0) /* save the return value */ + subql #4,%sp /* dummy return address */ + SAVE_SWITCH_STACK + jbsr syscall_trace_leave + +ret_from_signal: + RESTORE_SWITCH_STACK + addql #4,%sp + jra ret_from_exception + +ENTRY(system_call) + SAVE_ALL + + /* save top of frame*/ + pea %sp@ + jbsr set_esp0 + addql #4,%sp + + movel %sp@(PT_OFF_ORIG_D0),%d0 + + movel %sp,%d1 /* get thread_info pointer */ + andl #-THREAD_SIZE,%d1 + movel %d1,%a2 + btst #(TIF_SYSCALL_TRACE%8),%a2@(TI_FLAGS+(31-TIF_SYSCALL_TRACE)/8) + jne do_trace + cmpl #NR_syscalls,%d0 + jcc badsys + lsl #2,%d0 + lea sys_call_table,%a0 + movel %a0@(%d0), %a0 + jbsr %a0@ + movel %d0,%sp@(PT_OFF_D0) /* save the return value*/ + +ret_from_exception: + btst #5,%sp@(PT_OFF_SR) /* check if returning to kernel*/ + jeq Luser_return /* if so, skip resched, signals*/ + +Lkernel_return: + RESTORE_ALL + +Luser_return: + /* only allow interrupts when we are really the last one on the*/ + /* kernel stack, otherwise stack overflow can occur during*/ + /* heavy interrupt load*/ + andw #ALLOWINT,%sr + + movel %sp,%d1 /* get thread_info pointer */ + andl #-THREAD_SIZE,%d1 + movel %d1,%a2 +1: + move %a2@(TI_FLAGS),%d1 /* thread_info->flags */ + jne Lwork_to_do + RESTORE_ALL + +Lwork_to_do: + movel %a2@(TI_FLAGS),%d1 /* thread_info->flags */ + btst #TIF_NEED_RESCHED,%d1 + jne reschedule + +Lsignal_return: + subql #4,%sp /* dummy return address*/ + SAVE_SWITCH_STACK + pea %sp@(SWITCH_STACK_SIZE) + bsrw do_signal + addql #4,%sp + RESTORE_SWITCH_STACK + addql #4,%sp + jra 1b + +/* + * This is the main interrupt handler, responsible for calling do_IRQ() + */ +inthandler: + SAVE_ALL + movew %sp@(PT_OFF_FORMATVEC), %d0 + and.l #0x3ff, %d0 + lsr.l #0x02, %d0 + + movel %sp,%sp@- + movel %d0,%sp@- /* put vector # on stack*/ + jbsr do_IRQ /* process the IRQ*/ +3: addql #8,%sp /* pop parameters off stack*/ + bra ret_from_interrupt + +ret_from_interrupt: + jeq 1f +2: + RESTORE_ALL +1: + moveb %sp@(PT_OFF_SR), %d0 + and #7, %d0 + jhi 2b + /* check if we need to do software interrupts */ + + movel irq_stat+CPUSTAT_SOFTIRQ_PENDING,%d0 + jeq ret_from_exception + + pea ret_from_exception + jra do_softirq + + +/* + * Handler for uninitialized and spurious interrupts. + */ +bad_interrupt: + addql #1,num_spurious + rte + +/* + * Beware - when entering resume, prev (the current task) is + * in a0, next (the new task) is in a1,so don't change these + * registers until their contents are no longer needed. + */ +ENTRY(resume) + movel %a0,%d1 /* save prev thread in d1 */ + movew %sr,%a0@(TASK_THREAD+THREAD_SR) /* save sr */ + movel %usp,%a2 /* save usp */ + movel %a2,%a0@(TASK_THREAD+THREAD_USP) + + SAVE_SWITCH_STACK + movel %sp,%a0@(TASK_THREAD+THREAD_KSP) /* save kernel stack */ + movel %a1@(TASK_THREAD+THREAD_KSP),%sp /* restore new thread stack */ + RESTORE_SWITCH_STACK + + movel %a1@(TASK_THREAD+THREAD_USP),%a0 /* restore user stack */ + movel %a0,%usp + movew %a1@(TASK_THREAD+THREAD_SR),%sr /* restore thread status reg */ + rts + diff --git a/arch/m68k/platform/68360/head-ram.S b/arch/m68k/platform/68360/head-ram.S new file mode 100644 index 000000000000..8eb94fb6b971 --- /dev/null +++ b/arch/m68k/platform/68360/head-ram.S @@ -0,0 +1,403 @@ +/* arch/m68knommu/platform/68360/head-ram.S + * + * Startup code for Motorola 68360 + * + * Copyright 2001 (C) SED Systems, a Division of Calian Ltd. + * Based on: arch/m68knommu/platform/68328/pilot/crt0_rom.S + * Based on: arch/m68knommu/platform/68360/uCquicc/crt0_rom.S, 2.0.38.1.pre7 + * uClinux Kernel + * Copyright (C) Michael Leslie <mleslie@lineo.com> + * Based on: arch/m68knommu/platform/68EZ328/ucsimm/crt0_rom.S + * Copyright (C) 1998 D. Jeff Dionne <jeff@uclinux.org>, + * + */ +#define ASSEMBLY + +.global _stext +.global _start + +.global _rambase +.global _ramvec +.global _ramstart +.global _ramend + +.global _quicc_base +.global _periph_base + +#define RAMEND (CONFIG_RAMBASE + CONFIG_RAMSIZE) +#define ROMEND (CONFIG_ROMBASE + CONFIG_ROMSIZE) + +#define REGB 0x1000 +#define PEPAR (_dprbase + REGB + 0x0016) +#define GMR (_dprbase + REGB + 0x0040) +#define OR0 (_dprbase + REGB + 0x0054) +#define BR0 (_dprbase + REGB + 0x0050) +#define OR1 (_dprbase + REGB + 0x0064) +#define BR1 (_dprbase + REGB + 0x0060) +#define OR4 (_dprbase + REGB + 0x0094) +#define BR4 (_dprbase + REGB + 0x0090) +#define OR6 (_dprbase + REGB + 0x00b4) +#define BR6 (_dprbase + REGB + 0x00b0) +#define OR7 (_dprbase + REGB + 0x00c4) +#define BR7 (_dprbase + REGB + 0x00c0) + +#define MCR (_dprbase + REGB + 0x0000) +#define AVR (_dprbase + REGB + 0x0008) + +#define SYPCR (_dprbase + REGB + 0x0022) + +#define PLLCR (_dprbase + REGB + 0x0010) +#define CLKOCR (_dprbase + REGB + 0x000C) +#define CDVCR (_dprbase + REGB + 0x0014) + +#define BKAR (_dprbase + REGB + 0x0030) +#define BKCR (_dprbase + REGB + 0x0034) +#define SWIV (_dprbase + REGB + 0x0023) +#define PICR (_dprbase + REGB + 0x0026) +#define PITR (_dprbase + REGB + 0x002A) + +/* Define for all memory configuration */ +#define MCU_SIM_GMR 0x00000000 +#define SIM_OR_MASK 0x0fffffff + +/* Defines for chip select zero - the flash */ +#define SIM_OR0_MASK 0x20000002 +#define SIM_BR0_MASK 0x00000001 + + +/* Defines for chip select one - the RAM */ +#define SIM_OR1_MASK 0x10000000 +#define SIM_BR1_MASK 0x00000001 + +#define MCU_SIM_MBAR_ADRS 0x0003ff00 +#define MCU_SIM_MBAR_BA_MASK 0xfffff000 +#define MCU_SIM_MBAR_AS_MASK 0x00000001 + +#define MCU_SIM_PEPAR 0x00B4 + +#define MCU_DISABLE_INTRPTS 0x2700 +#define MCU_SIM_AVR 0x00 + +#define MCU_SIM_MCR 0x00005cff + +#define MCU_SIM_CLKOCR 0x00 +#define MCU_SIM_PLLCR 0x8000 +#define MCU_SIM_CDVCR 0x0000 + +#define MCU_SIM_SYPCR 0x0000 +#define MCU_SIM_SWIV 0x00 +#define MCU_SIM_PICR 0x0000 +#define MCU_SIM_PITR 0x0000 + + +#include <asm/m68360_regs.h> + + +/* + * By the time this RAM specific code begins to execute, DPRAM + * and DRAM should already be mapped and accessible. + */ + + .text +_start: +_stext: + nop + ori.w #MCU_DISABLE_INTRPTS, %sr /* disable interrupts: */ + /* We should not need to setup the boot stack the reset should do it. */ + movea.l #RAMEND, %sp /*set up stack at the end of DRAM:*/ + +set_mbar_register: + moveq.l #0x07, %d1 /* Setup MBAR */ + movec %d1, %dfc + + lea.l MCU_SIM_MBAR_ADRS, %a0 + move.l #_dprbase, %d0 + andi.l #MCU_SIM_MBAR_BA_MASK, %d0 + ori.l #MCU_SIM_MBAR_AS_MASK, %d0 + moves.l %d0, %a0@ + + moveq.l #0x05, %d1 + movec.l %d1, %dfc + + /* Now we can begin to access registers in DPRAM */ + +set_sim_mcr: + /* Set Module Configuration Register */ + move.l #MCU_SIM_MCR, MCR + + /* to do: Determine cause of reset */ + + /* + * configure system clock MC68360 p. 6-40 + * (value +1)*osc/128 = system clock + */ +set_sim_clock: + move.w #MCU_SIM_PLLCR, PLLCR + move.b #MCU_SIM_CLKOCR, CLKOCR + move.w #MCU_SIM_CDVCR, CDVCR + + /* Wait for the PLL to settle */ + move.w #16384, %d0 +pll_settle_wait: + subi.w #1, %d0 + bne pll_settle_wait + + /* Setup the system protection register, and watchdog timer register */ + move.b #MCU_SIM_SWIV, SWIV + move.w #MCU_SIM_PICR, PICR + move.w #MCU_SIM_PITR, PITR + move.w #MCU_SIM_SYPCR, SYPCR + + /* Clear DPRAM - system + parameter */ + movea.l #_dprbase, %a0 + movea.l #_dprbase+0x2000, %a1 + + /* Copy 0 to %a0 until %a0 == %a1 */ +clear_dpram: + movel #0, %a0@+ + cmpal %a0, %a1 + bhi clear_dpram + +configure_memory_controller: + /* Set up Global Memory Register (GMR) */ + move.l #MCU_SIM_GMR, %d0 + move.l %d0, GMR + +configure_chip_select_0: + move.l #RAMEND, %d0 + subi.l #__ramstart, %d0 + subq.l #0x01, %d0 + eori.l #SIM_OR_MASK, %d0 + ori.l #SIM_OR0_MASK, %d0 + move.l %d0, OR0 + + move.l #__ramstart, %d0 + ori.l #SIM_BR0_MASK, %d0 + move.l %d0, BR0 + +configure_chip_select_1: + move.l #ROMEND, %d0 + subi.l #__rom_start, %d0 + subq.l #0x01, %d0 + eori.l #SIM_OR_MASK, %d0 + ori.l #SIM_OR1_MASK, %d0 + move.l %d0, OR1 + + move.l #__rom_start, %d0 + ori.l #SIM_BR1_MASK, %d0 + move.l %d0, BR1 + + move.w #MCU_SIM_PEPAR, PEPAR + + /* point to vector table: */ + move.l #_romvec, %a0 + move.l #_ramvec, %a1 +copy_vectors: + move.l %a0@, %d0 + move.l %d0, %a1@ + move.l %a0@, %a1@ + addq.l #0x04, %a0 + addq.l #0x04, %a1 + cmp.l #_start, %a0 + blt copy_vectors + + move.l #_ramvec, %a1 + movec %a1, %vbr + + + /* Copy data segment from ROM to RAM */ + moveal #_stext, %a0 + moveal #_sdata, %a1 + moveal #_edata, %a2 + + /* Copy %a0 to %a1 until %a1 == %a2 */ +LD1: + move.l %a0@, %d0 + addq.l #0x04, %a0 + move.l %d0, %a1@ + addq.l #0x04, %a1 + cmp.l #_edata, %a1 + blt LD1 + + moveal #_sbss, %a0 + moveal #_ebss, %a1 + + /* Copy 0 to %a0 until %a0 == %a1 */ +L1: + movel #0, %a0@+ + cmpal %a0, %a1 + bhi L1 + +load_quicc: + move.l #_dprbase, _quicc_base + +store_ram_size: + /* Set ram size information */ + move.l #_sdata, _rambase + move.l #_ebss, _ramstart + move.l #RAMEND, %d0 + sub.l #0x1000, %d0 /* Reserve 4K for stack space.*/ + move.l %d0, _ramend /* Different from RAMEND.*/ + + pea 0 + pea env + pea %sp@(4) + pea 0 + + lea init_thread_union, %a2 + lea 0x2000(%a2), %sp + +lp: + jsr start_kernel + +_exit: + jmp _exit + + + .data + .align 4 +env: + .long 0 +_quicc_base: + .long 0 +_periph_base: + .long 0 +_ramvec: + .long 0 +_rambase: + .long 0 +_ramstart: + .long 0 +_ramend: + .long 0 +_dprbase: + .long 0xffffe000 + + .text + + /* + * These are the exception vectors at boot up, they are copied into RAM + * and then overwritten as needed. + */ + +.section ".data..initvect","awx" + .long RAMEND /* Reset: Initial Stack Pointer - 0. */ + .long _start /* Reset: Initial Program Counter - 1. */ + .long buserr /* Bus Error - 2. */ + .long trap /* Address Error - 3. */ + .long trap /* Illegal Instruction - 4. */ + .long trap /* Divide by zero - 5. */ + .long trap /* CHK, CHK2 Instructions - 6. */ + .long trap /* TRAPcc, TRAPV Instructions - 7. */ + .long trap /* Privilege Violation - 8. */ + .long trap /* Trace - 9. */ + .long trap /* Line 1010 Emulator - 10. */ + .long trap /* Line 1111 Emualtor - 11. */ + .long trap /* Harware Breakpoint - 12. */ + .long trap /* (Reserved for Coprocessor Protocol Violation)- 13. */ + .long trap /* Format Error - 14. */ + .long trap /* Uninitialized Interrupt - 15. */ + .long trap /* (Unassigned, Reserver) - 16. */ + .long trap /* (Unassigned, Reserver) - 17. */ + .long trap /* (Unassigned, Reserver) - 18. */ + .long trap /* (Unassigned, Reserver) - 19. */ + .long trap /* (Unassigned, Reserver) - 20. */ + .long trap /* (Unassigned, Reserver) - 21. */ + .long trap /* (Unassigned, Reserver) - 22. */ + .long trap /* (Unassigned, Reserver) - 23. */ + .long trap /* Spurious Interrupt - 24. */ + .long trap /* Level 1 Interrupt Autovector - 25. */ + .long trap /* Level 2 Interrupt Autovector - 26. */ + .long trap /* Level 3 Interrupt Autovector - 27. */ + .long trap /* Level 4 Interrupt Autovector - 28. */ + .long trap /* Level 5 Interrupt Autovector - 29. */ + .long trap /* Level 6 Interrupt Autovector - 30. */ + .long trap /* Level 7 Interrupt Autovector - 31. */ + .long system_call /* Trap Instruction Vectors 0 - 32. */ + .long trap /* Trap Instruction Vectors 1 - 33. */ + .long trap /* Trap Instruction Vectors 2 - 34. */ + .long trap /* Trap Instruction Vectors 3 - 35. */ + .long trap /* Trap Instruction Vectors 4 - 36. */ + .long trap /* Trap Instruction Vectors 5 - 37. */ + .long trap /* Trap Instruction Vectors 6 - 38. */ + .long trap /* Trap Instruction Vectors 7 - 39. */ + .long trap /* Trap Instruction Vectors 8 - 40. */ + .long trap /* Trap Instruction Vectors 9 - 41. */ + .long trap /* Trap Instruction Vectors 10 - 42. */ + .long trap /* Trap Instruction Vectors 11 - 43. */ + .long trap /* Trap Instruction Vectors 12 - 44. */ + .long trap /* Trap Instruction Vectors 13 - 45. */ + .long trap /* Trap Instruction Vectors 14 - 46. */ + .long trap /* Trap Instruction Vectors 15 - 47. */ + .long 0 /* (Reserved for Coprocessor) - 48. */ + .long 0 /* (Reserved for Coprocessor) - 49. */ + .long 0 /* (Reserved for Coprocessor) - 50. */ + .long 0 /* (Reserved for Coprocessor) - 51. */ + .long 0 /* (Reserved for Coprocessor) - 52. */ + .long 0 /* (Reserved for Coprocessor) - 53. */ + .long 0 /* (Reserved for Coprocessor) - 54. */ + .long 0 /* (Reserved for Coprocessor) - 55. */ + .long 0 /* (Reserved for Coprocessor) - 56. */ + .long 0 /* (Reserved for Coprocessor) - 57. */ + .long 0 /* (Reserved for Coprocessor) - 58. */ + .long 0 /* (Unassigned, Reserved) - 59. */ + .long 0 /* (Unassigned, Reserved) - 60. */ + .long 0 /* (Unassigned, Reserved) - 61. */ + .long 0 /* (Unassigned, Reserved) - 62. */ + .long 0 /* (Unassigned, Reserved) - 63. */ + /* The assignment of these vectors to the CPM is */ + /* dependent on the configuration of the CPM vba */ + /* fields. */ + .long 0 /* (User-Defined Vectors 1) CPM Error - 64. */ + .long 0 /* (User-Defined Vectors 2) CPM Parallel IO PC11- 65. */ + .long 0 /* (User-Defined Vectors 3) CPM Parallel IO PC10- 66. */ + .long 0 /* (User-Defined Vectors 4) CPM SMC2 / PIP - 67. */ + .long 0 /* (User-Defined Vectors 5) CPM SMC1 - 68. */ + .long 0 /* (User-Defined Vectors 6) CPM SPI - 69. */ + .long 0 /* (User-Defined Vectors 7) CPM Parallel IO PC9 - 70. */ + .long 0 /* (User-Defined Vectors 8) CPM Timer 4 - 71. */ + .long 0 /* (User-Defined Vectors 9) CPM Reserved - 72. */ + .long 0 /* (User-Defined Vectors 10) CPM Parallel IO PC8- 73. */ + .long 0 /* (User-Defined Vectors 11) CPM Parallel IO PC7- 74. */ + .long 0 /* (User-Defined Vectors 12) CPM Parallel IO PC6- 75. */ + .long 0 /* (User-Defined Vectors 13) CPM Timer 3 - 76. */ + .long 0 /* (User-Defined Vectors 14) CPM Reserved - 77. */ + .long 0 /* (User-Defined Vectors 15) CPM Parallel IO PC5- 78. */ + .long 0 /* (User-Defined Vectors 16) CPM Parallel IO PC4- 79. */ + .long 0 /* (User-Defined Vectors 17) CPM Reserved - 80. */ + .long 0 /* (User-Defined Vectors 18) CPM RISC Timer Tbl - 81. */ + .long 0 /* (User-Defined Vectors 19) CPM Timer 2 - 82. */ + .long 0 /* (User-Defined Vectors 21) CPM Reserved - 83. */ + .long 0 /* (User-Defined Vectors 22) CPM IDMA2 - 84. */ + .long 0 /* (User-Defined Vectors 23) CPM IDMA1 - 85. */ + .long 0 /* (User-Defined Vectors 24) CPM SDMA Bus Err - 86. */ + .long 0 /* (User-Defined Vectors 25) CPM Parallel IO PC3- 87. */ + .long 0 /* (User-Defined Vectors 26) CPM Parallel IO PC2- 88. */ + .long 0 /* (User-Defined Vectors 27) CPM Timer 1 - 89. */ + .long 0 /* (User-Defined Vectors 28) CPM Parallel IO PC1- 90. */ + .long 0 /* (User-Defined Vectors 29) CPM SCC 4 - 91. */ + .long 0 /* (User-Defined Vectors 30) CPM SCC 3 - 92. */ + .long 0 /* (User-Defined Vectors 31) CPM SCC 2 - 93. */ + .long 0 /* (User-Defined Vectors 32) CPM SCC 1 - 94. */ + .long 0 /* (User-Defined Vectors 33) CPM Parallel IO PC0- 95. */ + /* I don't think anything uses the vectors after here. */ + .long 0 /* (User-Defined Vectors 34) - 96. */ + .long 0,0,0,0,0 /* (User-Defined Vectors 35 - 39). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 40 - 49). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 50 - 59). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 60 - 69). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 70 - 79). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 80 - 89). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 90 - 99). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 100 - 109). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 110 - 119). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 120 - 129). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 130 - 139). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 140 - 149). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 150 - 159). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 160 - 169). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 170 - 179). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 180 - 189). */ + .long 0,0,0 /* (User-Defined Vectors 190 - 192). */ +.text +ignore: rte diff --git a/arch/m68k/platform/68360/head-rom.S b/arch/m68k/platform/68360/head-rom.S new file mode 100644 index 000000000000..97510e55b802 --- /dev/null +++ b/arch/m68k/platform/68360/head-rom.S @@ -0,0 +1,414 @@ +/* arch/m68knommu/platform/68360/head-rom.S + * + * Startup code for Motorola 68360 + * + * Copyright (C) SED Systems, a Division of Calian Ltd. + * Based on: arch/m68knommu/platform/68328/pilot/crt0_rom.S + * Based on: arch/m68knommu/platform/68360/uCquicc/crt0_rom.S, 2.0.38.1.pre7 + * uClinux Kernel + * Copyright (C) Michael Leslie <mleslie@lineo.com> + * Based on: arch/m68knommu/platform/68EZ328/ucsimm/crt0_rom.S + * Copyright (C) 1998 D. Jeff Dionne <jeff@uclinux.org>, + * + */ + +.global _stext +.global _sbss +.global _start + +.global _rambase +.global _ramvec +.global _ramstart +.global _ramend + +.global _quicc_base +.global _periph_base + +#define RAMEND (CONFIG_RAMBASE + CONFIG_RAMSIZE) + +#define REGB 0x1000 +#define PEPAR (_dprbase + REGB + 0x0016) +#define GMR (_dprbase + REGB + 0x0040) +#define OR0 (_dprbase + REGB + 0x0054) +#define BR0 (_dprbase + REGB + 0x0050) + +#define OR1 (_dprbase + REGB + 0x0064) +#define BR1 (_dprbase + REGB + 0x0060) + +#define OR2 (_dprbase + REGB + 0x0074) +#define BR2 (_dprbase + REGB + 0x0070) + +#define OR3 (_dprbase + REGB + 0x0084) +#define BR3 (_dprbase + REGB + 0x0080) + +#define OR4 (_dprbase + REGB + 0x0094) +#define BR4 (_dprbase + REGB + 0x0090) + +#define OR5 (_dprbase + REGB + 0x00A4) +#define BR5 (_dprbase + REGB + 0x00A0) + +#define OR6 (_dprbase + REGB + 0x00b4) +#define BR6 (_dprbase + REGB + 0x00b0) + +#define OR7 (_dprbase + REGB + 0x00c4) +#define BR7 (_dprbase + REGB + 0x00c0) + +#define MCR (_dprbase + REGB + 0x0000) +#define AVR (_dprbase + REGB + 0x0008) + +#define SYPCR (_dprbase + REGB + 0x0022) + +#define PLLCR (_dprbase + REGB + 0x0010) +#define CLKOCR (_dprbase + REGB + 0x000C) +#define CDVCR (_dprbase + REGB + 0x0014) + +#define BKAR (_dprbase + REGB + 0x0030) +#define BKCR (_dprbase + REGB + 0x0034) +#define SWIV (_dprbase + REGB + 0x0023) +#define PICR (_dprbase + REGB + 0x0026) +#define PITR (_dprbase + REGB + 0x002A) + +/* Define for all memory configuration */ +#define MCU_SIM_GMR 0x00000000 +#define SIM_OR_MASK 0x0fffffff + +/* Defines for chip select zero - the flash */ +#define SIM_OR0_MASK 0x20000000 +#define SIM_BR0_MASK 0x00000001 + +/* Defines for chip select one - the RAM */ +#define SIM_OR1_MASK 0x10000000 +#define SIM_BR1_MASK 0x00000001 + +#define MCU_SIM_MBAR_ADRS 0x0003ff00 +#define MCU_SIM_MBAR_BA_MASK 0xfffff000 +#define MCU_SIM_MBAR_AS_MASK 0x00000001 + +#define MCU_SIM_PEPAR 0x00B4 + +#define MCU_DISABLE_INTRPTS 0x2700 +#define MCU_SIM_AVR 0x00 + +#define MCU_SIM_MCR 0x00005cff + +#define MCU_SIM_CLKOCR 0x00 +#define MCU_SIM_PLLCR 0x8000 +#define MCU_SIM_CDVCR 0x0000 + +#define MCU_SIM_SYPCR 0x0000 +#define MCU_SIM_SWIV 0x00 +#define MCU_SIM_PICR 0x0000 +#define MCU_SIM_PITR 0x0000 + + +#include <asm/m68360_regs.h> + + +/* + * By the time this RAM specific code begins to execute, DPRAM + * and DRAM should already be mapped and accessible. + */ + + .text +_start: +_stext: + nop + ori.w #MCU_DISABLE_INTRPTS, %sr /* disable interrupts: */ + /* We should not need to setup the boot stack the reset should do it. */ + movea.l #RAMEND, %sp /* set up stack at the end of DRAM:*/ + + +set_mbar_register: + moveq.l #0x07, %d1 /* Setup MBAR */ + movec %d1, %dfc + + lea.l MCU_SIM_MBAR_ADRS, %a0 + move.l #_dprbase, %d0 + andi.l #MCU_SIM_MBAR_BA_MASK, %d0 + ori.l #MCU_SIM_MBAR_AS_MASK, %d0 + moves.l %d0, %a0@ + + moveq.l #0x05, %d1 + movec.l %d1, %dfc + + /* Now we can begin to access registers in DPRAM */ + +set_sim_mcr: + /* Set Module Configuration Register */ + move.l #MCU_SIM_MCR, MCR + + /* to do: Determine cause of reset */ + + /* + * configure system clock MC68360 p. 6-40 + * (value +1)*osc/128 = system clock + * or + * (value + 1)*osc = system clock + * You do not need to divide the oscillator by 128 unless you want to. + */ +set_sim_clock: + move.w #MCU_SIM_PLLCR, PLLCR + move.b #MCU_SIM_CLKOCR, CLKOCR + move.w #MCU_SIM_CDVCR, CDVCR + + /* Wait for the PLL to settle */ + move.w #16384, %d0 +pll_settle_wait: + subi.w #1, %d0 + bne pll_settle_wait + + /* Setup the system protection register, and watchdog timer register */ + move.b #MCU_SIM_SWIV, SWIV + move.w #MCU_SIM_PICR, PICR + move.w #MCU_SIM_PITR, PITR + move.w #MCU_SIM_SYPCR, SYPCR + + /* Clear DPRAM - system + parameter */ + movea.l #_dprbase, %a0 + movea.l #_dprbase+0x2000, %a1 + + /* Copy 0 to %a0 until %a0 == %a1 */ +clear_dpram: + movel #0, %a0@+ + cmpal %a0, %a1 + bhi clear_dpram + +configure_memory_controller: + /* Set up Global Memory Register (GMR) */ + move.l #MCU_SIM_GMR, %d0 + move.l %d0, GMR + +configure_chip_select_0: + move.l #0x00400000, %d0 + subq.l #0x01, %d0 + eori.l #SIM_OR_MASK, %d0 + ori.l #SIM_OR0_MASK, %d0 + move.l %d0, OR0 + + move.l #__rom_start, %d0 + ori.l #SIM_BR0_MASK, %d0 + move.l %d0, BR0 + + move.l #0x0, BR1 + move.l #0x0, BR2 + move.l #0x0, BR3 + move.l #0x0, BR4 + move.l #0x0, BR5 + move.l #0x0, BR6 + move.l #0x0, BR7 + + move.w #MCU_SIM_PEPAR, PEPAR + + /* point to vector table: */ + move.l #_romvec, %a0 + move.l #_ramvec, %a1 +copy_vectors: + move.l %a0@, %d0 + move.l %d0, %a1@ + move.l %a0@, %a1@ + addq.l #0x04, %a0 + addq.l #0x04, %a1 + cmp.l #_start, %a0 + blt copy_vectors + + move.l #_ramvec, %a1 + movec %a1, %vbr + + + /* Copy data segment from ROM to RAM */ + moveal #_etext, %a0 + moveal #_sdata, %a1 + moveal #_edata, %a2 + + /* Copy %a0 to %a1 until %a1 == %a2 */ +LD1: + move.l %a0@, %d0 + addq.l #0x04, %a0 + move.l %d0, %a1@ + addq.l #0x04, %a1 + cmp.l #_edata, %a1 + blt LD1 + + moveal #_sbss, %a0 + moveal #_ebss, %a1 + + /* Copy 0 to %a0 until %a0 == %a1 */ +L1: + movel #0, %a0@+ + cmpal %a0, %a1 + bhi L1 + +load_quicc: + move.l #_dprbase, _quicc_base + +store_ram_size: + /* Set ram size information */ + move.l #_sdata, _rambase + move.l #_ebss, _ramstart + move.l #RAMEND, %d0 + sub.l #0x1000, %d0 /* Reserve 4K for stack space.*/ + move.l %d0, _ramend /* Different from RAMEND.*/ + + pea 0 + pea env + pea %sp@(4) + pea 0 + + lea init_thread_union, %a2 + lea 0x2000(%a2), %sp + +lp: + jsr start_kernel + +_exit: + jmp _exit + + + .data + .align 4 +env: + .long 0 +_quicc_base: + .long 0 +_periph_base: + .long 0 +_ramvec: + .long 0 +_rambase: + .long 0 +_ramstart: + .long 0 +_ramend: + .long 0 +_dprbase: + .long 0xffffe000 + + + .text + + /* + * These are the exception vectors at boot up, they are copied into RAM + * and then overwritten as needed. + */ + +.section ".data..initvect","awx" + .long RAMEND /* Reset: Initial Stack Pointer - 0. */ + .long _start /* Reset: Initial Program Counter - 1. */ + .long buserr /* Bus Error - 2. */ + .long trap /* Address Error - 3. */ + .long trap /* Illegal Instruction - 4. */ + .long trap /* Divide by zero - 5. */ + .long trap /* CHK, CHK2 Instructions - 6. */ + .long trap /* TRAPcc, TRAPV Instructions - 7. */ + .long trap /* Privilege Violation - 8. */ + .long trap /* Trace - 9. */ + .long trap /* Line 1010 Emulator - 10. */ + .long trap /* Line 1111 Emualtor - 11. */ + .long trap /* Harware Breakpoint - 12. */ + .long trap /* (Reserved for Coprocessor Protocol Violation)- 13. */ + .long trap /* Format Error - 14. */ + .long trap /* Uninitialized Interrupt - 15. */ + .long trap /* (Unassigned, Reserver) - 16. */ + .long trap /* (Unassigned, Reserver) - 17. */ + .long trap /* (Unassigned, Reserver) - 18. */ + .long trap /* (Unassigned, Reserver) - 19. */ + .long trap /* (Unassigned, Reserver) - 20. */ + .long trap /* (Unassigned, Reserver) - 21. */ + .long trap /* (Unassigned, Reserver) - 22. */ + .long trap /* (Unassigned, Reserver) - 23. */ + .long trap /* Spurious Interrupt - 24. */ + .long trap /* Level 1 Interrupt Autovector - 25. */ + .long trap /* Level 2 Interrupt Autovector - 26. */ + .long trap /* Level 3 Interrupt Autovector - 27. */ + .long trap /* Level 4 Interrupt Autovector - 28. */ + .long trap /* Level 5 Interrupt Autovector - 29. */ + .long trap /* Level 6 Interrupt Autovector - 30. */ + .long trap /* Level 7 Interrupt Autovector - 31. */ + .long system_call /* Trap Instruction Vectors 0 - 32. */ + .long trap /* Trap Instruction Vectors 1 - 33. */ + .long trap /* Trap Instruction Vectors 2 - 34. */ + .long trap /* Trap Instruction Vectors 3 - 35. */ + .long trap /* Trap Instruction Vectors 4 - 36. */ + .long trap /* Trap Instruction Vectors 5 - 37. */ + .long trap /* Trap Instruction Vectors 6 - 38. */ + .long trap /* Trap Instruction Vectors 7 - 39. */ + .long trap /* Trap Instruction Vectors 8 - 40. */ + .long trap /* Trap Instruction Vectors 9 - 41. */ + .long trap /* Trap Instruction Vectors 10 - 42. */ + .long trap /* Trap Instruction Vectors 11 - 43. */ + .long trap /* Trap Instruction Vectors 12 - 44. */ + .long trap /* Trap Instruction Vectors 13 - 45. */ + .long trap /* Trap Instruction Vectors 14 - 46. */ + .long trap /* Trap Instruction Vectors 15 - 47. */ + .long 0 /* (Reserved for Coprocessor) - 48. */ + .long 0 /* (Reserved for Coprocessor) - 49. */ + .long 0 /* (Reserved for Coprocessor) - 50. */ + .long 0 /* (Reserved for Coprocessor) - 51. */ + .long 0 /* (Reserved for Coprocessor) - 52. */ + .long 0 /* (Reserved for Coprocessor) - 53. */ + .long 0 /* (Reserved for Coprocessor) - 54. */ + .long 0 /* (Reserved for Coprocessor) - 55. */ + .long 0 /* (Reserved for Coprocessor) - 56. */ + .long 0 /* (Reserved for Coprocessor) - 57. */ + .long 0 /* (Reserved for Coprocessor) - 58. */ + .long 0 /* (Unassigned, Reserved) - 59. */ + .long 0 /* (Unassigned, Reserved) - 60. */ + .long 0 /* (Unassigned, Reserved) - 61. */ + .long 0 /* (Unassigned, Reserved) - 62. */ + .long 0 /* (Unassigned, Reserved) - 63. */ + /* The assignment of these vectors to the CPM is */ + /* dependent on the configuration of the CPM vba */ + /* fields. */ + .long 0 /* (User-Defined Vectors 1) CPM Error - 64. */ + .long 0 /* (User-Defined Vectors 2) CPM Parallel IO PC11- 65. */ + .long 0 /* (User-Defined Vectors 3) CPM Parallel IO PC10- 66. */ + .long 0 /* (User-Defined Vectors 4) CPM SMC2 / PIP - 67. */ + .long 0 /* (User-Defined Vectors 5) CPM SMC1 - 68. */ + .long 0 /* (User-Defined Vectors 6) CPM SPI - 69. */ + .long 0 /* (User-Defined Vectors 7) CPM Parallel IO PC9 - 70. */ + .long 0 /* (User-Defined Vectors 8) CPM Timer 4 - 71. */ + .long 0 /* (User-Defined Vectors 9) CPM Reserved - 72. */ + .long 0 /* (User-Defined Vectors 10) CPM Parallel IO PC8- 73. */ + .long 0 /* (User-Defined Vectors 11) CPM Parallel IO PC7- 74. */ + .long 0 /* (User-Defined Vectors 12) CPM Parallel IO PC6- 75. */ + .long 0 /* (User-Defined Vectors 13) CPM Timer 3 - 76. */ + .long 0 /* (User-Defined Vectors 14) CPM Reserved - 77. */ + .long 0 /* (User-Defined Vectors 15) CPM Parallel IO PC5- 78. */ + .long 0 /* (User-Defined Vectors 16) CPM Parallel IO PC4- 79. */ + .long 0 /* (User-Defined Vectors 17) CPM Reserved - 80. */ + .long 0 /* (User-Defined Vectors 18) CPM RISC Timer Tbl - 81. */ + .long 0 /* (User-Defined Vectors 19) CPM Timer 2 - 82. */ + .long 0 /* (User-Defined Vectors 21) CPM Reserved - 83. */ + .long 0 /* (User-Defined Vectors 22) CPM IDMA2 - 84. */ + .long 0 /* (User-Defined Vectors 23) CPM IDMA1 - 85. */ + .long 0 /* (User-Defined Vectors 24) CPM SDMA Bus Err - 86. */ + .long 0 /* (User-Defined Vectors 25) CPM Parallel IO PC3- 87. */ + .long 0 /* (User-Defined Vectors 26) CPM Parallel IO PC2- 88. */ + .long 0 /* (User-Defined Vectors 27) CPM Timer 1 - 89. */ + .long 0 /* (User-Defined Vectors 28) CPM Parallel IO PC1- 90. */ + .long 0 /* (User-Defined Vectors 29) CPM SCC 4 - 91. */ + .long 0 /* (User-Defined Vectors 30) CPM SCC 3 - 92. */ + .long 0 /* (User-Defined Vectors 31) CPM SCC 2 - 93. */ + .long 0 /* (User-Defined Vectors 32) CPM SCC 1 - 94. */ + .long 0 /* (User-Defined Vectors 33) CPM Parallel IO PC0- 95. */ + /* I don't think anything uses the vectors after here. */ + .long 0 /* (User-Defined Vectors 34) - 96. */ + .long 0,0,0,0,0 /* (User-Defined Vectors 35 - 39). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 40 - 49). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 50 - 59). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 60 - 69). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 70 - 79). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 80 - 89). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 90 - 99). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 100 - 109). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 110 - 119). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 120 - 129). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 130 - 139). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 140 - 149). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 150 - 159). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 160 - 169). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 170 - 179). */ + .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 180 - 189). */ + .long 0,0,0 /* (User-Defined Vectors 190 - 192). */ +.text +ignore: rte diff --git a/arch/m68k/platform/68360/ints.c b/arch/m68k/platform/68360/ints.c new file mode 100644 index 000000000000..8de3feb568c6 --- /dev/null +++ b/arch/m68k/platform/68360/ints.c @@ -0,0 +1,139 @@ +/* + * linux/arch/$(ARCH)/platform/$(PLATFORM)/ints.c + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + * + * Copyright (c) 2000 Michael Leslie <mleslie@lineo.com> + * Copyright (c) 1996 Roman Zippel + * Copyright (c) 1999 D. Jeff Dionne <jeff@uclinux.org> + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <asm/traps.h> +#include <asm/machdep.h> +#include <asm/m68360.h> + +/* from quicc/commproc.c: */ +extern QUICC *pquicc; +extern void cpm_interrupt_init(void); + +#define INTERNAL_IRQS (96) + +/* assembler routines */ +asmlinkage void system_call(void); +asmlinkage void buserr(void); +asmlinkage void trap(void); +asmlinkage void bad_interrupt(void); +asmlinkage void inthandler(void); + +extern void *_ramvec[]; + +/* The number of spurious interrupts */ +volatile unsigned int num_spurious; + +static void intc_irq_unmask(struct irq_data *d) +{ + pquicc->intr_cimr |= (1 << d->irq); +} + +static void intc_irq_mask(struct irq_data *d) +{ + pquicc->intr_cimr &= ~(1 << d->irq); +} + +static void intc_irq_ack(struct irq_data *d) +{ + pquicc->intr_cisr = (1 << d->irq); +} + +static struct irq_chip intc_irq_chip = { + .name = "M68K-INTC", + .irq_mask = intc_irq_mask, + .irq_unmask = intc_irq_unmask, + .irq_ack = intc_irq_ack, +}; + +/* + * This function should be called during kernel startup to initialize + * the vector table. + */ +void init_IRQ(void) +{ + int i; + int vba = (CPM_VECTOR_BASE<<4); + + /* set up the vectors */ + _ramvec[2] = buserr; + _ramvec[3] = trap; + _ramvec[4] = trap; + _ramvec[5] = trap; + _ramvec[6] = trap; + _ramvec[7] = trap; + _ramvec[8] = trap; + _ramvec[9] = trap; + _ramvec[10] = trap; + _ramvec[11] = trap; + _ramvec[12] = trap; + _ramvec[13] = trap; + _ramvec[14] = trap; + _ramvec[15] = trap; + + _ramvec[32] = system_call; + _ramvec[33] = trap; + + cpm_interrupt_init(); + + /* set up CICR for vector base address and irq level */ + /* irl = 4, hp = 1f - see MC68360UM p 7-377 */ + pquicc->intr_cicr = 0x00e49f00 | vba; + + /* CPM interrupt vectors: (p 7-376) */ + _ramvec[vba+CPMVEC_ERROR] = bad_interrupt; /* Error */ + _ramvec[vba+CPMVEC_PIO_PC11] = inthandler; /* pio - pc11 */ + _ramvec[vba+CPMVEC_PIO_PC10] = inthandler; /* pio - pc10 */ + _ramvec[vba+CPMVEC_SMC2] = inthandler; /* smc2/pip */ + _ramvec[vba+CPMVEC_SMC1] = inthandler; /* smc1 */ + _ramvec[vba+CPMVEC_SPI] = inthandler; /* spi */ + _ramvec[vba+CPMVEC_PIO_PC9] = inthandler; /* pio - pc9 */ + _ramvec[vba+CPMVEC_TIMER4] = inthandler; /* timer 4 */ + _ramvec[vba+CPMVEC_RESERVED1] = inthandler; /* reserved */ + _ramvec[vba+CPMVEC_PIO_PC8] = inthandler; /* pio - pc8 */ + _ramvec[vba+CPMVEC_PIO_PC7] = inthandler; /* pio - pc7 */ + _ramvec[vba+CPMVEC_PIO_PC6] = inthandler; /* pio - pc6 */ + _ramvec[vba+CPMVEC_TIMER3] = inthandler; /* timer 3 */ + _ramvec[vba+CPMVEC_PIO_PC5] = inthandler; /* pio - pc5 */ + _ramvec[vba+CPMVEC_PIO_PC4] = inthandler; /* pio - pc4 */ + _ramvec[vba+CPMVEC_RESERVED2] = inthandler; /* reserved */ + _ramvec[vba+CPMVEC_RISCTIMER] = inthandler; /* timer table */ + _ramvec[vba+CPMVEC_TIMER2] = inthandler; /* timer 2 */ + _ramvec[vba+CPMVEC_RESERVED3] = inthandler; /* reserved */ + _ramvec[vba+CPMVEC_IDMA2] = inthandler; /* idma 2 */ + _ramvec[vba+CPMVEC_IDMA1] = inthandler; /* idma 1 */ + _ramvec[vba+CPMVEC_SDMA_CB_ERR] = inthandler; /* sdma channel bus error */ + _ramvec[vba+CPMVEC_PIO_PC3] = inthandler; /* pio - pc3 */ + _ramvec[vba+CPMVEC_PIO_PC2] = inthandler; /* pio - pc2 */ + /* _ramvec[vba+CPMVEC_TIMER1] = cpm_isr_timer1; */ /* timer 1 */ + _ramvec[vba+CPMVEC_TIMER1] = inthandler; /* timer 1 */ + _ramvec[vba+CPMVEC_PIO_PC1] = inthandler; /* pio - pc1 */ + _ramvec[vba+CPMVEC_SCC4] = inthandler; /* scc 4 */ + _ramvec[vba+CPMVEC_SCC3] = inthandler; /* scc 3 */ + _ramvec[vba+CPMVEC_SCC2] = inthandler; /* scc 2 */ + _ramvec[vba+CPMVEC_SCC1] = inthandler; /* scc 1 */ + _ramvec[vba+CPMVEC_PIO_PC0] = inthandler; /* pio - pc0 */ + + + /* turn off all CPM interrupts */ + pquicc->intr_cimr = 0x00000000; + + for (i = 0; (i < NR_IRQS); i++) { + set_irq_chip(i, &intc_irq_chip); + set_irq_handler(i, handle_level_irq); + } +} + |