diff options
Diffstat (limited to 'arch/m68knommu/platform/68328/head-pilot.S')
| -rw-r--r-- | arch/m68knommu/platform/68328/head-pilot.S | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/arch/m68knommu/platform/68328/head-pilot.S b/arch/m68knommu/platform/68328/head-pilot.S new file mode 100644 index 00000000000..c46775fe04b --- /dev/null +++ b/arch/m68knommu/platform/68328/head-pilot.S @@ -0,0 +1,224 @@ +/* + * linux/arch/m68knommu/platform/68328/head-rom.S + * - A startup file for the MC68328 + * + * Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>, + * Kenneth Albanowski <kjahds@kjahds.com>, + * The Silver Hammer Group, Ltd. + * + * (c) 1995, Dionne & Associates + * (c) 1995, DKG Display Tech. + */ + +#define ASSEMBLY + +#define IMMED # +#define DBG_PUTC(x) moveb IMMED x, 0xfffff907 + +#include <linux/config.h> + +.global _stext +.global _start + +.global _rambase +.global __ramvec +.global _ramvec +.global _ramstart +.global _ramend + +.global penguin_bits + +#ifdef CONFIG_PILOT + +#define IMR 0xFFFFF304 + + .data + .align 16 + +penguin_bits: +#include "bootlogo.rh" + +#endif + +/*****************************************************************************/ + +.data + +/* + * Set up the usable of RAM stuff. Size of RAM is determined then + * an initial stack set up at the end. + */ +.align 4 +_ramvec: +.long 0 +_rambase: +.long 0 +_ramstart: +.long 0 +_ramend: +.long 0 + +.text + +_start: +_stext: + + +#ifdef CONFIG_M68328 + +#ifdef CONFIG_PILOT + .byte 0x4e, 0xfa, 0x00, 0x0a /* Jmp +X bytes */ + .byte 'b', 'o', 'o', 't' + .word 10000 + + nop +#endif + + moveq #0, %d0 + movew %d0, 0xfffff618 /* Watchdog off */ + movel #0x00011f07, 0xfffff114 /* CS A1 Mask */ + + movew #0x0800, 0xfffff906 /* Ignore CTS */ + movew #0x010b, 0xfffff902 /* BAUD to 9600 */ + + movew #0x2410, 0xfffff200 /* PLLCR */ + movew #0x123, 0xfffff202 /* PLLFSR */ + +#ifdef CONFIG_PILOT + moveb #0, 0xfffffA27 /* LCKCON */ + movel #_start, 0xfffffA00 /* LSSA */ + moveb #0xa, 0xfffffA05 /* LVPW */ + movew #0x9f, 0xFFFFFa08 /* LXMAX */ + movew #0x9f, 0xFFFFFa0a /* LYMAX */ + moveb #9, 0xfffffa29 /* LBAR */ + moveb #0, 0xfffffa25 /* LPXCD */ + moveb #0x04, 0xFFFFFa20 /* LPICF */ + moveb #0x58, 0xfffffA27 /* LCKCON */ + moveb #0x85, 0xfffff429 /* PFDATA */ + moveb #0xd8, 0xfffffA27 /* LCKCON */ + moveb #0xc5, 0xfffff429 /* PFDATA */ + moveb #0xd5, 0xfffff429 /* PFDATA */ + + moveal #0x00100000, %a3 + moveal #0x100ffc00, %a4 +#endif /* CONFIG_PILOT */ + +#endif /* CONFIG_M68328 */ + + movew #0x2700, %sr + lea %a4@(-4), %sp + + DBG_PUTC('\r') + DBG_PUTC('\n') + DBG_PUTC('A') + + moveq #0,%d0 + movew #16384, %d0 /* PLL settle wait loop */ +L0: + subw #1, %d0 + bne L0 + + DBG_PUTC('B') + + /* Copy command line from beginning of RAM (+16) to end of bss */ + movel #__ramvec, %d7 + addl #16, %d7 + moveal %d7, %a0 + moveal #_ebss, %a1 + lea %a1@(512), %a2 + + DBG_PUTC('C') + + /* Copy %a0 to %a1 until %a1 == %a2 */ +L2: + movel %a0@+, %d0 + movel %d0, %a1@+ + cmpal %a1, %a2 + bhi L2 + + /* Copy data+init segment from ROM to RAM */ + moveal #_etext, %a0 + moveal #_sdata, %a1 + moveal #__init_end, %a2 + + DBG_PUTC('D') + + /* Copy %a0 to %a1 until %a1 == %a2 */ +LD1: + movel %a0@+, %d0 + movel %d0, %a1@+ + cmpal %a1, %a2 + bhi LD1 + + DBG_PUTC('E') + + moveal #_sbss, %a0 + moveal #_ebss, %a1 + + /* Copy 0 to %a0 until %a0 == %a1 */ +L1: + movel #0, %a0@+ + cmpal %a0, %a1 + bhi L1 + + DBG_PUTC('F') + + /* Copy command line from end of bss to command line */ + moveal #_ebss, %a0 + moveal #command_line, %a1 + lea %a1@(512), %a2 + + DBG_PUTC('G') + + /* Copy %a0 to %a1 until %a1 == %a2 */ +L3: + movel %a0@+, %d0 + movel %d0, %a1@+ + cmpal %a1, %a2 + bhi L3 + + movel #_sdata, %d0 + movel %d0, _rambase + movel #_ebss, %d0 + movel %d0, _ramstart + + movel %a4, %d0 + subl #4096, %d0 /* Reserve 4K of stack */ + moveq #79, %d7 + movel %d0, _ramend + + movel %a3, %d0 + movel %d0, rom_length + + pea 0 + pea env + pea %sp@(4) + pea 0 + + DBG_PUTC('H') + +#ifdef CONFIG_PILOT + movel #penguin_bits, 0xFFFFFA00 + moveb #10, 0xFFFFFA05 + movew #160, 0xFFFFFA08 + movew #160, 0xFFFFFA0A +#endif /* CONFIG_PILOT */ + + DBG_PUTC('I') + + lea init_thread_union, %a0 + lea 0x2000(%a0), %sp + + DBG_PUTC('J') + DBG_PUTC('\r') + DBG_PUTC('\n') + + jsr start_kernel +_exit: + + jmp _exit + + + .data +env: + .long 0 |