diff options
Diffstat (limited to 'arch/m68knommu/platform/68360')
| -rw-r--r-- | arch/m68knommu/platform/68360/Makefile | 10 | ||||
| -rw-r--r-- | arch/m68knommu/platform/68360/commproc.c | 308 | ||||
| -rw-r--r-- | arch/m68knommu/platform/68360/config.c | 208 | ||||
| -rw-r--r-- | arch/m68knommu/platform/68360/entry.S | 184 | ||||
| -rw-r--r-- | arch/m68knommu/platform/68360/ints.c | 335 |
5 files changed, 0 insertions, 1045 deletions
diff --git a/arch/m68knommu/platform/68360/Makefile b/arch/m68knommu/platform/68360/Makefile deleted file mode 100644 index cf5af73a578..00000000000 --- a/arch/m68knommu/platform/68360/Makefile +++ /dev/null @@ -1,10 +0,0 @@ -# -# 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/m68knommu/platform/68360/commproc.c b/arch/m68knommu/platform/68360/commproc.c deleted file mode 100644 index 6acb8d294cb..00000000000 --- a/arch/m68knommu/platform/68360/commproc.c +++ /dev/null @@ -1,308 +0,0 @@ -/* - * 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, IRQ_FLG_LOCK, "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/m68knommu/platform/68360/config.c b/arch/m68knommu/platform/68360/config.c deleted file mode 100644 index 3db244625f0..00000000000 --- a/arch/m68knommu/platform/68360/config.c +++ /dev/null @@ -1,208 +0,0 @@ -/* - * 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/config.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/tty.h> -#include <linux/console.h> - -#include <asm/setup.h> -#include <asm/system.h> -#include <asm/pgtable.h> -#include <asm/irq.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; - -void M68360_init_IRQ(void); - -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 - -extern void config_M68360_irq(void); - -void BSP_sched_init(void (*timer_routine)(int, void *, struct pt_regs *)) -{ - unsigned char prescaler; - unsigned short tgcr_save; - int return_value; - -#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, IRQ_FLG_LOCK, "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 */ -// request_irq(IRQ_MACHSPEC | CPMVEC_TIMER1, timer_routine, IRQ_FLG_LOCK, "timer", NULL); - //return_value = request_irq( CPMVEC_TIMER1, timer_routine, IRQ_FLG_LOCK, "timer", NULL); - return_value = request_irq(CPMVEC_TIMER1 , timer_routine, IRQ_FLG_LOCK, - "Timer", NULL); - - /* Start timer 1: */ - tgcr_save = (pquicc->timer_tgcr & 0xfff0) | 0x0001; - pquicc->timer_tgcr = tgcr_save; -} - - -void BSP_tick(void) -{ - /* Reset Timer1 */ - /* TSTAT &= 0; */ - - pquicc->timer_ter1 = 0x0002; /* clear timer event */ -} - -unsigned long BSP_gettimeoffset (void) -{ - return 0; -} - -void BSP_gettod (int *yearp, int *monp, int *dayp, - int *hourp, int *minp, int *secp) -{ -} - -int BSP_hwclk(int op, struct hwclk_time *t) -{ - if (!op) { - /* read */ - } else { - /* write */ - } - return 0; -} - -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; - moveb #0, 0xFFFFF300; - moveal 0(%a0), %sp; - moveal 4(%a0), %a0; - jmp (%a0); - "); -} - -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_sched_init = BSP_sched_init; - mach_tick = BSP_tick; - mach_gettimeoffset = BSP_gettimeoffset; - mach_gettod = BSP_gettod; - mach_hwclk = NULL; - mach_set_clock_mmss = NULL; - mach_reset = BSP_reset; -} diff --git a/arch/m68knommu/platform/68360/entry.S b/arch/m68knommu/platform/68360/entry.S deleted file mode 100644 index 8ff48adf24a..00000000000 --- a/arch/m68knommu/platform/68360/entry.S +++ /dev/null @@ -1,184 +0,0 @@ -/* - * 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/config.h> -#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_D0) - jra ret_from_exception - -do_trace: - movel #-ENOSYS,%sp@(PT_D0) /* needed for strace*/ - subql #4,%sp - SAVE_SWITCH_STACK - jbsr syscall_trace - RESTORE_SWITCH_STACK - addql #4,%sp - movel %sp@(PT_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_D0) /* save the return value */ - subql #4,%sp /* dummy return address */ - SAVE_SWITCH_STACK - jbsr syscall_trace - -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 - - btst #PF_TRACESYS_BIT,%a2@(TASK_FLAGS+PF_TRACESYS_OFF) - 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_D0) /* save the return value*/ - -ret_from_exception: - btst #5,%sp@(PT_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 - move %a2@(TI_FLAGS),%d1 /* thread_info->flags */ - andl #_TIF_WORK_MASK,%d1 - 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) - clrl %sp@- - bsrw do_signal - addql #8,%sp - RESTORE_SWITCH_STACK - addql #4,%sp -Lreturn: - RESTORE_ALL - -/* - * This is the main interrupt handler, responsible for calling process_int() - */ -inthandler: - SAVE_ALL - addql #1,local_irq_count /* put exception # in d0*/ - movew %sp@(PT_VECTOR), %d0 - and.l #0x3ff, %d0 - lsr.l #0x02, %d0 - - movel %sp,%sp@- - movel %d0,%sp@- /* put vector # on stack*/ - jbsr process_int /* process the IRQ*/ -3: addql #8,%sp /* pop parameters off stack*/ - bra ret_from_interrupt - -ret_from_interrupt: - subql #1,local_irq_count - jeq 1f -2: - RESTORE_ALL -1: - moveb %sp@(PT_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/m68knommu/platform/68360/ints.c b/arch/m68knommu/platform/68360/ints.c deleted file mode 100644 index ba184db1651..00000000000 --- a/arch/m68knommu/platform/68360/ints.c +++ /dev/null @@ -1,335 +0,0 @@ -/* - * 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/config.h> -#include <linux/module.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/kernel_stat.h> -#include <linux/errno.h> - -#include <asm/system.h> -#include <asm/irq.h> -#include <asm/traps.h> -#include <asm/io.h> -#include <asm/machdep.h> -#include <asm/setup.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 irqreturn_t bad_interrupt(void); -asmlinkage irqreturn_t inthandler(void); - -extern void *_ramvec[]; - -/* The number of spurious interrupts */ -volatile unsigned int num_spurious; -unsigned int local_irq_count[NR_CPUS]; - -/* irq node variables for the 32 (potential) on chip sources */ -static irq_node_t int_irq_list[INTERNAL_IRQS]; - -static short int_irq_ablecount[INTERNAL_IRQS]; - -/* - * This function should be called during kernel startup to initialize - * IRQ handling routines. - */ - -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_RISCTIMER] = inthandler; /* reserved */ - _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; - - /* initialize handlers */ - for (i = 0; i < INTERNAL_IRQS; i++) { - int_irq_list[i].handler = NULL; - int_irq_list[i].flags = IRQ_FLG_STD; - int_irq_list[i].dev_id = NULL; - int_irq_list[i].devname = NULL; - } -} - -#if 0 -void M68360_insert_irq(irq_node_t **list, irq_node_t *node) -{ - unsigned long flags; - irq_node_t *cur; - - if (!node->dev_id) - printk(KERN_INFO "%s: Warning: dev_id of %s is zero\n", - __FUNCTION__, node->devname); - - local_irq_save(flags); - - cur = *list; - - while (cur) { - list = &cur->next; - cur = cur->next; - } - - node->next = cur; - *list = node; - - local_irq_restore(flags); -} - -void M68360_delete_irq(irq_node_t **list, void *dev_id) -{ - unsigned long flags; - irq_node_t *node; - - local_irq_save(flags); - - for (node = *list; node; list = &node->next, node = *list) { - if (node->dev_id == dev_id) { - *list = node->next; - /* Mark it as free. */ - node->handler = NULL; - local_irq_restore(flags); - return; - } - } - local_irq_restore(flags); - printk (KERN_INFO "%s: tried to remove invalid irq\n", __FUNCTION__); -} -#endif - -int request_irq( - unsigned int irq, - irqreturn_t (*handler)(int, void *, struct pt_regs *), - unsigned long flags, - const char *devname, - void *dev_id) -{ - int mask = (1<<irq); - - irq += (CPM_VECTOR_BASE<<4); - - if (irq >= INTERNAL_IRQS) { - printk (KERN_ERR "%s: Unknown IRQ %d from %s\n", __FUNCTION__, irq, devname); - return -ENXIO; - } - - if (!(int_irq_list[irq].flags & IRQ_FLG_STD)) { - if (int_irq_list[irq].flags & IRQ_FLG_LOCK) { - printk(KERN_ERR "%s: IRQ %d from %s is not replaceable\n", - __FUNCTION__, irq, int_irq_list[irq].devname); - return -EBUSY; - } - if (flags & IRQ_FLG_REPLACE) { - printk(KERN_ERR "%s: %s can't replace IRQ %d from %s\n", - __FUNCTION__, devname, irq, int_irq_list[irq].devname); - return -EBUSY; - } - } - int_irq_list[irq].handler = handler; - int_irq_list[irq].flags = flags; - int_irq_list[irq].dev_id = dev_id; - int_irq_list[irq].devname = devname; - - /* enable in the CIMR */ - if (!int_irq_ablecount[irq]) - pquicc->intr_cimr |= mask; - /* *(volatile unsigned long *)0xfffff304 &= ~(1<<irq); */ - - return 0; -} - -EXPORT_SYMBOL(request_irq); - -void free_irq(unsigned int irq, void *dev_id) -{ - if (irq >= INTERNAL_IRQS) { - printk (KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq); - return; - } - - if (int_irq_list[irq].dev_id != dev_id) - printk(KERN_INFO "%s: removing probably wrong IRQ %d from %s\n", - __FUNCTION__, irq, int_irq_list[irq].devname); - int_irq_list[irq].handler = NULL; - int_irq_list[irq].flags = IRQ_FLG_STD; - int_irq_list[irq].dev_id = NULL; - int_irq_list[irq].devname = NULL; - - *(volatile unsigned long *)0xfffff304 |= 1<<irq; -} - -EXPORT_SYMBOL(free_irq); - -#if 0 -/* - * Enable/disable a particular machine specific interrupt source. - * Note that this may affect other interrupts in case of a shared interrupt. - * This function should only be called for a _very_ short time to change some - * internal data, that may not be changed by the interrupt at the same time. - * int_(enable|disable)_irq calls may also be nested. - */ -void M68360_enable_irq(unsigned int irq) -{ - if (irq >= INTERNAL_IRQS) { - printk(KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq); - return; - } - - if (--int_irq_ablecount[irq]) - return; - - /* enable the interrupt */ - *(volatile unsigned long *)0xfffff304 &= ~(1<<irq); -} - -void M68360_disable_irq(unsigned int irq) -{ - if (irq >= INTERNAL_IRQS) { - printk(KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq); - return; - } - - if (int_irq_ablecount[irq]++) - return; - - /* disable the interrupt */ - *(volatile unsigned long *)0xfffff304 |= 1<<irq; -} -#endif - -int show_interrupts(struct seq_file *p, void *v) -{ - int i = *(loff_t *) v; - - if (i < NR_IRQS) { - if (int_irq_list[i].devname) { - seq_printf(p, "%3d: %10u ", i, kstat_cpu(0).irqs[i]); - if (int_irq_list[i].flags & IRQ_FLG_LOCK) - seq_printf(p, "L "); - else - seq_printf(p, " "); - seq_printf(p, "%s\n", int_irq_list[i].devname); - } - } - if (i == NR_IRQS) - seq_printf(p, " : %10u spurious\n", num_spurious); - - return 0; -} - -/* The 68k family did not have a good way to determine the source - * of interrupts until later in the family. The EC000 core does - * not provide the vector number on the stack, we vector everything - * into one vector and look in the blasted mask register... - * This code is designed to be fast, almost constant time, not clean! - */ -void process_int(int vec, struct pt_regs *fp) -{ - int irq; - int mask; - - /* unsigned long pend = *(volatile unsigned long *)0xfffff30c; */ - - /* irq = vec + (CPM_VECTOR_BASE<<4); */ - irq = vec; - - /* unsigned long pend = *(volatile unsigned long *)pquicc->intr_cipr; */ - - /* Bugger all that weirdness. For the moment, I seem to know where I came from; - * vec is passed from a specific ISR, so I'll use it. */ - - if (int_irq_list[irq].handler) { - int_irq_list[irq].handler(irq , int_irq_list[irq].dev_id, fp); - kstat_cpu(0).irqs[irq]++; - pquicc->intr_cisr = (1 << vec); /* indicate that irq has been serviced */ - } else { - printk(KERN_ERR "unregistered interrupt %d!\nTurning it off in the CIMR...\n", irq); - /* *(volatile unsigned long *)0xfffff304 |= mask; */ - pquicc->intr_cimr &= ~(1 << vec); - num_spurious += 1; - } - return(IRQ_HANDLED); -} |