diff options
Diffstat (limited to 'arch/ppc/syslib/ppc8xx_pic.c')
-rw-r--r-- | arch/ppc/syslib/ppc8xx_pic.c | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/arch/ppc/syslib/ppc8xx_pic.c b/arch/ppc/syslib/ppc8xx_pic.c deleted file mode 100644 index bce9a75..0000000 --- a/arch/ppc/syslib/ppc8xx_pic.c +++ /dev/null @@ -1,126 +0,0 @@ -#include <linux/module.h> -#include <linux/stddef.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/signal.h> -#include <linux/interrupt.h> -#include <asm/irq.h> -#include <asm/io.h> -#include <asm/8xx_immap.h> -#include <asm/mpc8xx.h> -#include "ppc8xx_pic.h" - -extern int cpm_get_irq(void); - -/* The 8xx internal interrupt controller. It is usually - * the only interrupt controller. Some boards, like the MBX and - * Sandpoint have the 8259 as a secondary controller. Depending - * upon the processor type, the internal controller can have as - * few as 16 interrupts or as many as 64. We could use the - * "clear_bit()" and "set_bit()" functions like other platforms, - * but they are overkill for us. - */ - -static void m8xx_mask_irq(unsigned int irq_nr) -{ - int bit, word; - - bit = irq_nr & 0x1f; - word = irq_nr >> 5; - - ppc_cached_irq_mask[word] &= ~(1 << (31-bit)); - out_be32(&((immap_t *)IMAP_ADDR)->im_siu_conf.sc_simask, ppc_cached_irq_mask[word]); -} - -static void m8xx_unmask_irq(unsigned int irq_nr) -{ - int bit, word; - - bit = irq_nr & 0x1f; - word = irq_nr >> 5; - - ppc_cached_irq_mask[word] |= (1 << (31-bit)); - out_be32(&((immap_t *)IMAP_ADDR)->im_siu_conf.sc_simask, ppc_cached_irq_mask[word]); -} - -static void m8xx_end_irq(unsigned int irq_nr) -{ - if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS)) - && irq_desc[irq_nr].action) { - int bit, word; - - bit = irq_nr & 0x1f; - word = irq_nr >> 5; - - ppc_cached_irq_mask[word] |= (1 << (31-bit)); - out_be32(&((immap_t *)IMAP_ADDR)->im_siu_conf.sc_simask, ppc_cached_irq_mask[word]); - } -} - - -static void m8xx_mask_and_ack(unsigned int irq_nr) -{ - int bit, word; - - bit = irq_nr & 0x1f; - word = irq_nr >> 5; - - ppc_cached_irq_mask[word] &= ~(1 << (31-bit)); - out_be32(&((immap_t *)IMAP_ADDR)->im_siu_conf.sc_simask, ppc_cached_irq_mask[word]); - out_be32(&((immap_t *)IMAP_ADDR)->im_siu_conf.sc_sipend, 1 << (31-bit)); -} - -struct hw_interrupt_type ppc8xx_pic = { - .typename = " 8xx SIU ", - .enable = m8xx_unmask_irq, - .disable = m8xx_mask_irq, - .ack = m8xx_mask_and_ack, - .end = m8xx_end_irq, -}; - -/* - * We either return a valid interrupt or -1 if there is nothing pending - */ -int -m8xx_get_irq(struct pt_regs *regs) -{ - int irq; - - /* For MPC8xx, read the SIVEC register and shift the bits down - * to get the irq number. - */ - irq = in_be32(&((immap_t *)IMAP_ADDR)->im_siu_conf.sc_sivec) >> 26; - - /* - * When we read the sivec without an interrupt to process, we will - * get back SIU_LEVEL7. In this case, return -1 - */ - if (irq == CPM_INTERRUPT) - irq = CPM_IRQ_OFFSET + cpm_get_irq(); -#if defined(CONFIG_PCI) - else if (irq == ISA_BRIDGE_INT) { - int isa_irq; - - if ((isa_irq = i8259_poll(regs)) >= 0) - irq = I8259_IRQ_OFFSET + isa_irq; - } -#endif /* CONFIG_PCI */ - else if (irq == SIU_LEVEL7) - irq = -1; - - return irq; -} - -#if defined(CONFIG_MBX) && defined(CONFIG_PCI) -/* Only the MBX uses the external 8259. This allows us to catch standard - * drivers that may mess up the internal interrupt controllers, and also - * allow them to run without modification on the MBX. - */ -void mbx_i8259_action(int irq, void *dev_id, struct pt_regs *regs) -{ - /* This interrupt handler never actually gets called. It is - * installed only to unmask the 8259 cascade interrupt in the SIU - * and to make the 8259 cascade interrupt visible in /proc/interrupts. - */ -} -#endif /* CONFIG_PCI */ |