431 lines
11 KiB
C
431 lines
11 KiB
C
/*--------------------------------------------------------------------------
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--
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-- Identity : Linux50 Debug Funcions
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--
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-- File : arch/sh64/lib/dbg.C
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--
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-- Copyright 2000, 2001 STMicroelectronics Limited.
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-- Copyright 2004 Richard Curnow (evt_debug etc)
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--
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--------------------------------------------------------------------------*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/fs.h>
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#include <asm/mmu_context.h>
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typedef u64 regType_t;
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static regType_t getConfigReg(u64 id)
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{
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register u64 reg __asm__("r2");
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asm volatile ("getcfg %1, 0, %0":"=r" (reg):"r"(id));
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return (reg);
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}
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/* ======================================================================= */
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static char *szTab[] = { "4k", "64k", "1M", "512M" };
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static char *protTab[] = { "----",
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"---R",
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"--X-",
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"--XR",
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"-W--",
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"-W-R",
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"-WX-",
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"-WXR",
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"U---",
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"U--R",
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"U-X-",
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"U-XR",
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"UW--",
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"UW-R",
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"UWX-",
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"UWXR"
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};
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#define ITLB_BASE 0x00000000
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#define DTLB_BASE 0x00800000
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#define MAX_TLBs 64
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/* PTE High */
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#define GET_VALID(pte) ((pte) & 0x1)
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#define GET_SHARED(pte) ((pte) & 0x2)
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#define GET_ASID(pte) ((pte >> 2) & 0x0ff)
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#define GET_EPN(pte) ((pte) & 0xfffff000)
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/* PTE Low */
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#define GET_CBEHAVIOR(pte) ((pte) & 0x3)
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#define GET_PAGE_SIZE(pte) szTab[((pte >> 3) & 0x3)]
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#define GET_PROTECTION(pte) protTab[((pte >> 6) & 0xf)]
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#define GET_PPN(pte) ((pte) & 0xfffff000)
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#define PAGE_1K_MASK 0x00000000
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#define PAGE_4K_MASK 0x00000010
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#define PAGE_64K_MASK 0x00000080
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#define MMU_PAGESIZE_MASK (PAGE_64K_MASK | PAGE_4K_MASK)
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#define PAGE_1MB_MASK MMU_PAGESIZE_MASK
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#define PAGE_1K (1024)
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#define PAGE_4K (1024 * 4)
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#define PAGE_64K (1024 * 64)
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#define PAGE_1MB (1024 * 1024)
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#define HOW_TO_READ_TLB_CONTENT \
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"[ ID] PPN EPN ASID Share CB P.Size PROT.\n"
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void print_single_tlb(unsigned long tlb, int single_print)
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{
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regType_t pteH;
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regType_t pteL;
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unsigned int valid, shared, asid, epn, cb, ppn;
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char *pSize;
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char *pProt;
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/*
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** in case of single print <single_print> is true, this implies:
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** 1) print the TLB in any case also if NOT VALID
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** 2) print out the header
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*/
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pteH = getConfigReg(tlb);
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valid = GET_VALID(pteH);
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if (single_print)
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printk(HOW_TO_READ_TLB_CONTENT);
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else if (!valid)
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return;
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pteL = getConfigReg(tlb + 1);
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shared = GET_SHARED(pteH);
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asid = GET_ASID(pteH);
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epn = GET_EPN(pteH);
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cb = GET_CBEHAVIOR(pteL);
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pSize = GET_PAGE_SIZE(pteL);
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pProt = GET_PROTECTION(pteL);
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ppn = GET_PPN(pteL);
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printk("[%c%2ld] 0x%08x 0x%08x %03d %02x %02x %4s %s\n",
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((valid) ? ' ' : 'u'), ((tlb & 0x0ffff) / TLB_STEP),
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ppn, epn, asid, shared, cb, pSize, pProt);
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}
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void print_dtlb(void)
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{
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int count;
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unsigned long tlb;
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printk(" ================= SH-5 D-TLBs Status ===================\n");
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printk(HOW_TO_READ_TLB_CONTENT);
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tlb = DTLB_BASE;
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for (count = 0; count < MAX_TLBs; count++, tlb += TLB_STEP)
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print_single_tlb(tlb, 0);
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printk
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(" =============================================================\n");
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}
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void print_itlb(void)
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{
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int count;
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unsigned long tlb;
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printk(" ================= SH-5 I-TLBs Status ===================\n");
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printk(HOW_TO_READ_TLB_CONTENT);
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tlb = ITLB_BASE;
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for (count = 0; count < MAX_TLBs; count++, tlb += TLB_STEP)
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print_single_tlb(tlb, 0);
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printk
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(" =============================================================\n");
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}
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/* ======================================================================= */
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#ifdef CONFIG_POOR_MANS_STRACE
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#include "syscalltab.h"
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struct ring_node {
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int evt;
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int ret_addr;
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int event;
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int tra;
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int pid;
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unsigned long sp;
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unsigned long pc;
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};
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static struct ring_node event_ring[16];
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static int event_ptr = 0;
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struct stored_syscall_data {
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int pid;
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int syscall_number;
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};
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#define N_STORED_SYSCALLS 16
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static struct stored_syscall_data stored_syscalls[N_STORED_SYSCALLS];
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static int syscall_next=0;
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static int syscall_next_print=0;
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void evt_debug(int evt, int ret_addr, int event, int tra, struct pt_regs *regs)
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{
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int syscallno = tra & 0xff;
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unsigned long sp;
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unsigned long stack_bottom;
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int pid;
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struct ring_node *rr;
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pid = current->pid;
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stack_bottom = (unsigned long) task_stack_page(current);
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asm volatile("ori r15, 0, %0" : "=r" (sp));
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rr = event_ring + event_ptr;
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rr->evt = evt;
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rr->ret_addr = ret_addr;
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rr->event = event;
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rr->tra = tra;
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rr->pid = pid;
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rr->sp = sp;
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rr->pc = regs->pc;
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if (sp < stack_bottom + 3092) {
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printk("evt_debug : stack underflow report\n");
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int i, j;
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for (j=0, i = event_ptr; j<16; j++) {
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rr = event_ring + i;
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printk("evt=%08x event=%08x tra=%08x pid=%5d sp=%08lx pc=%08lx\n",
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rr->evt, rr->event, rr->tra, rr->pid, rr->sp, rr->pc);
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i--;
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i &= 15;
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}
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panic("STACK UNDERFLOW\n");
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}
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event_ptr = (event_ptr + 1) & 15;
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if ((event == 2) && (evt == 0x160)) {
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if (syscallno < NUM_SYSCALL_INFO_ENTRIES) {
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/* Store the syscall information to print later. We
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* can't print this now - currently we're running with
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* SR.BL=1, so we can't take a tlbmiss (which could occur
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* in the console drivers under printk).
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*
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* Just overwrite old entries on ring overflow - this
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* is only for last-hope debugging. */
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stored_syscalls[syscall_next].pid = current->pid;
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stored_syscalls[syscall_next].syscall_number = syscallno;
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syscall_next++;
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syscall_next &= (N_STORED_SYSCALLS - 1);
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}
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}
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}
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static void drain_syscalls(void) {
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while (syscall_next_print != syscall_next) {
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printk("Task %d: %s()\n",
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stored_syscalls[syscall_next_print].pid,
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syscall_info_table[stored_syscalls[syscall_next_print].syscall_number].name);
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syscall_next_print++;
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syscall_next_print &= (N_STORED_SYSCALLS - 1);
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}
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}
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void evt_debug2(unsigned int ret)
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{
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drain_syscalls();
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printk("Task %d: syscall returns %08x\n", current->pid, ret);
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}
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void evt_debug_ret_from_irq(struct pt_regs *regs)
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{
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int pid;
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struct ring_node *rr;
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pid = current->pid;
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rr = event_ring + event_ptr;
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rr->evt = 0xffff;
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rr->ret_addr = 0;
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rr->event = 0;
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rr->tra = 0;
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rr->pid = pid;
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rr->pc = regs->pc;
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event_ptr = (event_ptr + 1) & 15;
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}
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void evt_debug_ret_from_exc(struct pt_regs *regs)
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{
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int pid;
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struct ring_node *rr;
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pid = current->pid;
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rr = event_ring + event_ptr;
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rr->evt = 0xfffe;
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rr->ret_addr = 0;
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rr->event = 0;
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rr->tra = 0;
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rr->pid = pid;
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rr->pc = regs->pc;
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event_ptr = (event_ptr + 1) & 15;
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}
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#endif /* CONFIG_POOR_MANS_STRACE */
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/* ======================================================================= */
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void show_excp_regs(char *from, int trapnr, int signr, struct pt_regs *regs)
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{
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unsigned long long ah, al, bh, bl, ch, cl;
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printk("\n");
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printk("EXCEPTION - %s: task %d; Linux trap # %d; signal = %d\n",
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((from) ? from : "???"), current->pid, trapnr, signr);
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asm volatile ("getcon " __EXPEVT ", %0":"=r"(ah));
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asm volatile ("getcon " __EXPEVT ", %0":"=r"(al));
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ah = (ah) >> 32;
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al = (al) & 0xffffffff;
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asm volatile ("getcon " __KCR1 ", %0":"=r"(bh));
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asm volatile ("getcon " __KCR1 ", %0":"=r"(bl));
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bh = (bh) >> 32;
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bl = (bl) & 0xffffffff;
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asm volatile ("getcon " __INTEVT ", %0":"=r"(ch));
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asm volatile ("getcon " __INTEVT ", %0":"=r"(cl));
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ch = (ch) >> 32;
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cl = (cl) & 0xffffffff;
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printk("EXPE: %08Lx%08Lx KCR1: %08Lx%08Lx INTE: %08Lx%08Lx\n",
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ah, al, bh, bl, ch, cl);
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asm volatile ("getcon " __PEXPEVT ", %0":"=r"(ah));
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asm volatile ("getcon " __PEXPEVT ", %0":"=r"(al));
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ah = (ah) >> 32;
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al = (al) & 0xffffffff;
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asm volatile ("getcon " __PSPC ", %0":"=r"(bh));
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asm volatile ("getcon " __PSPC ", %0":"=r"(bl));
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bh = (bh) >> 32;
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bl = (bl) & 0xffffffff;
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asm volatile ("getcon " __PSSR ", %0":"=r"(ch));
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asm volatile ("getcon " __PSSR ", %0":"=r"(cl));
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ch = (ch) >> 32;
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cl = (cl) & 0xffffffff;
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printk("PEXP: %08Lx%08Lx PSPC: %08Lx%08Lx PSSR: %08Lx%08Lx\n",
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ah, al, bh, bl, ch, cl);
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ah = (regs->pc) >> 32;
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al = (regs->pc) & 0xffffffff;
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bh = (regs->regs[18]) >> 32;
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bl = (regs->regs[18]) & 0xffffffff;
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ch = (regs->regs[15]) >> 32;
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cl = (regs->regs[15]) & 0xffffffff;
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printk("PC : %08Lx%08Lx LINK: %08Lx%08Lx SP : %08Lx%08Lx\n",
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ah, al, bh, bl, ch, cl);
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ah = (regs->sr) >> 32;
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al = (regs->sr) & 0xffffffff;
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asm volatile ("getcon " __TEA ", %0":"=r"(bh));
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asm volatile ("getcon " __TEA ", %0":"=r"(bl));
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bh = (bh) >> 32;
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bl = (bl) & 0xffffffff;
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asm volatile ("getcon " __KCR0 ", %0":"=r"(ch));
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asm volatile ("getcon " __KCR0 ", %0":"=r"(cl));
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ch = (ch) >> 32;
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cl = (cl) & 0xffffffff;
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printk("SR : %08Lx%08Lx TEA : %08Lx%08Lx KCR0: %08Lx%08Lx\n",
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ah, al, bh, bl, ch, cl);
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ah = (regs->regs[0]) >> 32;
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al = (regs->regs[0]) & 0xffffffff;
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bh = (regs->regs[1]) >> 32;
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bl = (regs->regs[1]) & 0xffffffff;
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ch = (regs->regs[2]) >> 32;
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cl = (regs->regs[2]) & 0xffffffff;
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printk("R0 : %08Lx%08Lx R1 : %08Lx%08Lx R2 : %08Lx%08Lx\n",
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ah, al, bh, bl, ch, cl);
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ah = (regs->regs[3]) >> 32;
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al = (regs->regs[3]) & 0xffffffff;
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bh = (regs->regs[4]) >> 32;
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bl = (regs->regs[4]) & 0xffffffff;
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ch = (regs->regs[5]) >> 32;
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cl = (regs->regs[5]) & 0xffffffff;
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printk("R3 : %08Lx%08Lx R4 : %08Lx%08Lx R5 : %08Lx%08Lx\n",
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ah, al, bh, bl, ch, cl);
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ah = (regs->regs[6]) >> 32;
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al = (regs->regs[6]) & 0xffffffff;
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bh = (regs->regs[7]) >> 32;
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bl = (regs->regs[7]) & 0xffffffff;
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ch = (regs->regs[8]) >> 32;
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cl = (regs->regs[8]) & 0xffffffff;
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printk("R6 : %08Lx%08Lx R7 : %08Lx%08Lx R8 : %08Lx%08Lx\n",
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ah, al, bh, bl, ch, cl);
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ah = (regs->regs[9]) >> 32;
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al = (regs->regs[9]) & 0xffffffff;
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bh = (regs->regs[10]) >> 32;
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bl = (regs->regs[10]) & 0xffffffff;
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ch = (regs->regs[11]) >> 32;
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cl = (regs->regs[11]) & 0xffffffff;
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printk("R9 : %08Lx%08Lx R10 : %08Lx%08Lx R11 : %08Lx%08Lx\n",
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ah, al, bh, bl, ch, cl);
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printk("....\n");
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ah = (regs->tregs[0]) >> 32;
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al = (regs->tregs[0]) & 0xffffffff;
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bh = (regs->tregs[1]) >> 32;
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bl = (regs->tregs[1]) & 0xffffffff;
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ch = (regs->tregs[2]) >> 32;
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cl = (regs->tregs[2]) & 0xffffffff;
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printk("T0 : %08Lx%08Lx T1 : %08Lx%08Lx T2 : %08Lx%08Lx\n",
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ah, al, bh, bl, ch, cl);
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printk("....\n");
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print_dtlb();
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print_itlb();
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}
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/* ======================================================================= */
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/*
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** Depending on <base> scan the MMU, Data or Instruction side
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** looking for a valid mapping matching Eaddr & asid.
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** Return -1 if not found or the TLB id entry otherwise.
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** Note: it works only for 4k pages!
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*/
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static unsigned long
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lookup_mmu_side(unsigned long base, unsigned long Eaddr, unsigned long asid)
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{
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regType_t pteH;
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unsigned long epn;
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int count;
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epn = Eaddr & 0xfffff000;
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for (count = 0; count < MAX_TLBs; count++, base += TLB_STEP) {
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pteH = getConfigReg(base);
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if (GET_VALID(pteH))
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if ((unsigned long) GET_EPN(pteH) == epn)
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if ((unsigned long) GET_ASID(pteH) == asid)
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break;
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}
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return ((unsigned long) ((count < MAX_TLBs) ? base : -1));
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}
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unsigned long lookup_dtlb(unsigned long Eaddr)
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{
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unsigned long asid = get_asid();
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return (lookup_mmu_side((u64) DTLB_BASE, Eaddr, asid));
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}
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unsigned long lookup_itlb(unsigned long Eaddr)
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{
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unsigned long asid = get_asid();
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return (lookup_mmu_side((u64) ITLB_BASE, Eaddr, asid));
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}
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void print_page(struct page *page)
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{
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printk(" page[%p] -> index 0x%lx, count 0x%x, flags 0x%lx\n",
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page, page->index, page_count(page), page->flags);
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printk(" address_space = %p, pages =%ld\n", page->mapping,
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page->mapping->nrpages);
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}
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