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Diffstat (limited to 'arch/ppc/syslib/cpm2_pic.c')
-rw-r--r--arch/ppc/syslib/cpm2_pic.c177
1 files changed, 0 insertions, 177 deletions
diff --git a/arch/ppc/syslib/cpm2_pic.c b/arch/ppc/syslib/cpm2_pic.c
deleted file mode 100644
index fb2d5842641..00000000000
--- a/arch/ppc/syslib/cpm2_pic.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/* The CPM2 internal interrupt controller. It is usually
- * the only interrupt controller.
- * There are two 32-bit registers (high/low) for up to 64
- * possible interrupts.
- *
- * Now, the fun starts.....Interrupt Numbers DO NOT MAP
- * in a simple arithmetic fashion to mask or pending registers.
- * That is, interrupt 4 does not map to bit position 4.
- * We create two tables, indexed by vector number, to indicate
- * which register to use and which bit in the register to use.
- */
-
-#include <linux/stddef.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/irq.h>
-
-#include <asm/immap_cpm2.h>
-#include <asm/mpc8260.h>
-
-#include "cpm2_pic.h"
-
-static u_char irq_to_siureg[] = {
- 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-/* bit numbers do not match the docs, these are precomputed so the bit for
- * a given irq is (1 << irq_to_siubit[irq]) */
-static u_char irq_to_siubit[] = {
- 0, 15, 14, 13, 12, 11, 10, 9,
- 8, 7, 6, 5, 4, 3, 2, 1,
- 2, 1, 0, 14, 13, 12, 11, 10,
- 9, 8, 7, 6, 5, 4, 3, 0,
- 31, 30, 29, 28, 27, 26, 25, 24,
- 23, 22, 21, 20, 19, 18, 17, 16,
- 16, 17, 18, 19, 20, 21, 22, 23,
- 24, 25, 26, 27, 28, 29, 30, 31,
-};
-
-static void cpm2_mask_irq(unsigned int irq_nr)
-{
- int bit, word;
- volatile uint *simr;
-
- irq_nr -= CPM_IRQ_OFFSET;
-
- bit = irq_to_siubit[irq_nr];
- word = irq_to_siureg[irq_nr];
-
- simr = &(cpm2_immr->im_intctl.ic_simrh);
- ppc_cached_irq_mask[word] &= ~(1 << bit);
- simr[word] = ppc_cached_irq_mask[word];
-}
-
-static void cpm2_unmask_irq(unsigned int irq_nr)
-{
- int bit, word;
- volatile uint *simr;
-
- irq_nr -= CPM_IRQ_OFFSET;
-
- bit = irq_to_siubit[irq_nr];
- word = irq_to_siureg[irq_nr];
-
- simr = &(cpm2_immr->im_intctl.ic_simrh);
- ppc_cached_irq_mask[word] |= 1 << bit;
- simr[word] = ppc_cached_irq_mask[word];
-}
-
-static void cpm2_mask_and_ack(unsigned int irq_nr)
-{
- int bit, word;
- volatile uint *simr, *sipnr;
-
- irq_nr -= CPM_IRQ_OFFSET;
-
- bit = irq_to_siubit[irq_nr];
- word = irq_to_siureg[irq_nr];
-
- simr = &(cpm2_immr->im_intctl.ic_simrh);
- sipnr = &(cpm2_immr->im_intctl.ic_sipnrh);
- ppc_cached_irq_mask[word] &= ~(1 << bit);
- simr[word] = ppc_cached_irq_mask[word];
- sipnr[word] = 1 << bit;
-}
-
-static void cpm2_end_irq(unsigned int irq_nr)
-{
- int bit, word;
- volatile uint *simr;
-
- if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS))
- && irq_desc[irq_nr].action) {
-
- irq_nr -= CPM_IRQ_OFFSET;
- bit = irq_to_siubit[irq_nr];
- word = irq_to_siureg[irq_nr];
-
- simr = &(cpm2_immr->im_intctl.ic_simrh);
- ppc_cached_irq_mask[word] |= 1 << bit;
- simr[word] = ppc_cached_irq_mask[word];
- /*
- * Work around large numbers of spurious IRQs on PowerPC 82xx
- * systems.
- */
- mb();
- }
-}
-
-static struct hw_interrupt_type cpm2_pic = {
- .typename = " CPM2 SIU ",
- .enable = cpm2_unmask_irq,
- .disable = cpm2_mask_irq,
- .ack = cpm2_mask_and_ack,
- .end = cpm2_end_irq,
-};
-
-int cpm2_get_irq(void)
-{
- int irq;
- unsigned long bits;
-
- /* For CPM2, read the SIVEC register and shift the bits down
- * to get the irq number. */
- bits = cpm2_immr->im_intctl.ic_sivec;
- irq = bits >> 26;
-
- if (irq == 0)
- return(-1);
- return irq+CPM_IRQ_OFFSET;
-}
-
-void cpm2_init_IRQ(void)
-{
- int i;
-
- /* Clear the CPM IRQ controller, in case it has any bits set
- * from the bootloader
- */
-
- /* Mask out everything */
- cpm2_immr->im_intctl.ic_simrh = 0x00000000;
- cpm2_immr->im_intctl.ic_simrl = 0x00000000;
- wmb();
-
- /* Ack everything */
- cpm2_immr->im_intctl.ic_sipnrh = 0xffffffff;
- cpm2_immr->im_intctl.ic_sipnrl = 0xffffffff;
- wmb();
-
- /* Dummy read of the vector */
- i = cpm2_immr->im_intctl.ic_sivec;
- rmb();
-
- /* Initialize the default interrupt mapping priorities,
- * in case the boot rom changed something on us.
- */
- cpm2_immr->im_intctl.ic_sicr = 0;
- cpm2_immr->im_intctl.ic_scprrh = 0x05309770;
- cpm2_immr->im_intctl.ic_scprrl = 0x05309770;
-
-
- /* Enable chaining to OpenPIC, and make everything level
- */
- for (i = 0; i < NR_CPM_INTS; i++) {
- irq_desc[i+CPM_IRQ_OFFSET].chip = &cpm2_pic;
- irq_desc[i+CPM_IRQ_OFFSET].status |= IRQ_LEVEL;
- }
-}