mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
430 lines
11 KiB
C
430 lines
11 KiB
C
/*--------------------------------------------------------------------------
|
|
--
|
|
-- Identity : Linux50 Debug Funcions
|
|
--
|
|
-- File : arch/sh64/lib/dbg.C
|
|
--
|
|
-- Copyright 2000, 2001 STMicroelectronics Limited.
|
|
-- Copyright 2004 Richard Curnow (evt_debug etc)
|
|
--
|
|
--------------------------------------------------------------------------*/
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/fs.h>
|
|
#include <asm/mmu_context.h>
|
|
|
|
typedef u64 regType_t;
|
|
|
|
static regType_t getConfigReg(u64 id)
|
|
{
|
|
register u64 reg __asm__("r2");
|
|
asm volatile ("getcfg %1, 0, %0":"=r" (reg):"r"(id));
|
|
return (reg);
|
|
}
|
|
|
|
/* ======================================================================= */
|
|
|
|
static char *szTab[] = { "4k", "64k", "1M", "512M" };
|
|
static char *protTab[] = { "----",
|
|
"---R",
|
|
"--X-",
|
|
"--XR",
|
|
"-W--",
|
|
"-W-R",
|
|
"-WX-",
|
|
"-WXR",
|
|
"U---",
|
|
"U--R",
|
|
"U-X-",
|
|
"U-XR",
|
|
"UW--",
|
|
"UW-R",
|
|
"UWX-",
|
|
"UWXR"
|
|
};
|
|
#define ITLB_BASE 0x00000000
|
|
#define DTLB_BASE 0x00800000
|
|
#define MAX_TLBs 64
|
|
/* PTE High */
|
|
#define GET_VALID(pte) ((pte) & 0x1)
|
|
#define GET_SHARED(pte) ((pte) & 0x2)
|
|
#define GET_ASID(pte) ((pte >> 2) & 0x0ff)
|
|
#define GET_EPN(pte) ((pte) & 0xfffff000)
|
|
|
|
/* PTE Low */
|
|
#define GET_CBEHAVIOR(pte) ((pte) & 0x3)
|
|
#define GET_PAGE_SIZE(pte) szTab[((pte >> 3) & 0x3)]
|
|
#define GET_PROTECTION(pte) protTab[((pte >> 6) & 0xf)]
|
|
#define GET_PPN(pte) ((pte) & 0xfffff000)
|
|
|
|
#define PAGE_1K_MASK 0x00000000
|
|
#define PAGE_4K_MASK 0x00000010
|
|
#define PAGE_64K_MASK 0x00000080
|
|
#define MMU_PAGESIZE_MASK (PAGE_64K_MASK | PAGE_4K_MASK)
|
|
#define PAGE_1MB_MASK MMU_PAGESIZE_MASK
|
|
#define PAGE_1K (1024)
|
|
#define PAGE_4K (1024 * 4)
|
|
#define PAGE_64K (1024 * 64)
|
|
#define PAGE_1MB (1024 * 1024)
|
|
|
|
#define HOW_TO_READ_TLB_CONTENT \
|
|
"[ ID] PPN EPN ASID Share CB P.Size PROT.\n"
|
|
|
|
void print_single_tlb(unsigned long tlb, int single_print)
|
|
{
|
|
regType_t pteH;
|
|
regType_t pteL;
|
|
unsigned int valid, shared, asid, epn, cb, ppn;
|
|
char *pSize;
|
|
char *pProt;
|
|
|
|
/*
|
|
** in case of single print <single_print> is true, this implies:
|
|
** 1) print the TLB in any case also if NOT VALID
|
|
** 2) print out the header
|
|
*/
|
|
|
|
pteH = getConfigReg(tlb);
|
|
valid = GET_VALID(pteH);
|
|
if (single_print)
|
|
printk(HOW_TO_READ_TLB_CONTENT);
|
|
else if (!valid)
|
|
return;
|
|
|
|
pteL = getConfigReg(tlb + 1);
|
|
|
|
shared = GET_SHARED(pteH);
|
|
asid = GET_ASID(pteH);
|
|
epn = GET_EPN(pteH);
|
|
cb = GET_CBEHAVIOR(pteL);
|
|
pSize = GET_PAGE_SIZE(pteL);
|
|
pProt = GET_PROTECTION(pteL);
|
|
ppn = GET_PPN(pteL);
|
|
printk("[%c%2ld] 0x%08x 0x%08x %03d %02x %02x %4s %s\n",
|
|
((valid) ? ' ' : 'u'), ((tlb & 0x0ffff) / TLB_STEP),
|
|
ppn, epn, asid, shared, cb, pSize, pProt);
|
|
}
|
|
|
|
void print_dtlb(void)
|
|
{
|
|
int count;
|
|
unsigned long tlb;
|
|
|
|
printk(" ================= SH-5 D-TLBs Status ===================\n");
|
|
printk(HOW_TO_READ_TLB_CONTENT);
|
|
tlb = DTLB_BASE;
|
|
for (count = 0; count < MAX_TLBs; count++, tlb += TLB_STEP)
|
|
print_single_tlb(tlb, 0);
|
|
printk
|
|
(" =============================================================\n");
|
|
}
|
|
|
|
void print_itlb(void)
|
|
{
|
|
int count;
|
|
unsigned long tlb;
|
|
|
|
printk(" ================= SH-5 I-TLBs Status ===================\n");
|
|
printk(HOW_TO_READ_TLB_CONTENT);
|
|
tlb = ITLB_BASE;
|
|
for (count = 0; count < MAX_TLBs; count++, tlb += TLB_STEP)
|
|
print_single_tlb(tlb, 0);
|
|
printk
|
|
(" =============================================================\n");
|
|
}
|
|
|
|
/* ======================================================================= */
|
|
|
|
#ifdef CONFIG_POOR_MANS_STRACE
|
|
|
|
#include "syscalltab.h"
|
|
|
|
struct ring_node {
|
|
int evt;
|
|
int ret_addr;
|
|
int event;
|
|
int tra;
|
|
int pid;
|
|
unsigned long sp;
|
|
unsigned long pc;
|
|
};
|
|
|
|
static struct ring_node event_ring[16];
|
|
static int event_ptr = 0;
|
|
|
|
struct stored_syscall_data {
|
|
int pid;
|
|
int syscall_number;
|
|
};
|
|
|
|
#define N_STORED_SYSCALLS 16
|
|
|
|
static struct stored_syscall_data stored_syscalls[N_STORED_SYSCALLS];
|
|
static int syscall_next=0;
|
|
static int syscall_next_print=0;
|
|
|
|
void evt_debug(int evt, int ret_addr, int event, int tra, struct pt_regs *regs)
|
|
{
|
|
int syscallno = tra & 0xff;
|
|
unsigned long sp;
|
|
unsigned long stack_bottom;
|
|
int pid;
|
|
struct ring_node *rr;
|
|
|
|
pid = current->pid;
|
|
stack_bottom = (unsigned long) task_stack_page(current);
|
|
asm volatile("ori r15, 0, %0" : "=r" (sp));
|
|
rr = event_ring + event_ptr;
|
|
rr->evt = evt;
|
|
rr->ret_addr = ret_addr;
|
|
rr->event = event;
|
|
rr->tra = tra;
|
|
rr->pid = pid;
|
|
rr->sp = sp;
|
|
rr->pc = regs->pc;
|
|
|
|
if (sp < stack_bottom + 3092) {
|
|
printk("evt_debug : stack underflow report\n");
|
|
int i, j;
|
|
for (j=0, i = event_ptr; j<16; j++) {
|
|
rr = event_ring + i;
|
|
printk("evt=%08x event=%08x tra=%08x pid=%5d sp=%08lx pc=%08lx\n",
|
|
rr->evt, rr->event, rr->tra, rr->pid, rr->sp, rr->pc);
|
|
i--;
|
|
i &= 15;
|
|
}
|
|
panic("STACK UNDERFLOW\n");
|
|
}
|
|
|
|
event_ptr = (event_ptr + 1) & 15;
|
|
|
|
if ((event == 2) && (evt == 0x160)) {
|
|
if (syscallno < NUM_SYSCALL_INFO_ENTRIES) {
|
|
/* Store the syscall information to print later. We
|
|
* can't print this now - currently we're running with
|
|
* SR.BL=1, so we can't take a tlbmiss (which could occur
|
|
* in the console drivers under printk).
|
|
*
|
|
* Just overwrite old entries on ring overflow - this
|
|
* is only for last-hope debugging. */
|
|
stored_syscalls[syscall_next].pid = current->pid;
|
|
stored_syscalls[syscall_next].syscall_number = syscallno;
|
|
syscall_next++;
|
|
syscall_next &= (N_STORED_SYSCALLS - 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void drain_syscalls(void) {
|
|
while (syscall_next_print != syscall_next) {
|
|
printk("Task %d: %s()\n",
|
|
stored_syscalls[syscall_next_print].pid,
|
|
syscall_info_table[stored_syscalls[syscall_next_print].syscall_number].name);
|
|
syscall_next_print++;
|
|
syscall_next_print &= (N_STORED_SYSCALLS - 1);
|
|
}
|
|
}
|
|
|
|
void evt_debug2(unsigned int ret)
|
|
{
|
|
drain_syscalls();
|
|
printk("Task %d: syscall returns %08x\n", current->pid, ret);
|
|
}
|
|
|
|
void evt_debug_ret_from_irq(struct pt_regs *regs)
|
|
{
|
|
int pid;
|
|
struct ring_node *rr;
|
|
|
|
pid = current->pid;
|
|
rr = event_ring + event_ptr;
|
|
rr->evt = 0xffff;
|
|
rr->ret_addr = 0;
|
|
rr->event = 0;
|
|
rr->tra = 0;
|
|
rr->pid = pid;
|
|
rr->pc = regs->pc;
|
|
event_ptr = (event_ptr + 1) & 15;
|
|
}
|
|
|
|
void evt_debug_ret_from_exc(struct pt_regs *regs)
|
|
{
|
|
int pid;
|
|
struct ring_node *rr;
|
|
|
|
pid = current->pid;
|
|
rr = event_ring + event_ptr;
|
|
rr->evt = 0xfffe;
|
|
rr->ret_addr = 0;
|
|
rr->event = 0;
|
|
rr->tra = 0;
|
|
rr->pid = pid;
|
|
rr->pc = regs->pc;
|
|
event_ptr = (event_ptr + 1) & 15;
|
|
}
|
|
|
|
#endif /* CONFIG_POOR_MANS_STRACE */
|
|
|
|
/* ======================================================================= */
|
|
|
|
void show_excp_regs(char *from, int trapnr, int signr, struct pt_regs *regs)
|
|
{
|
|
|
|
unsigned long long ah, al, bh, bl, ch, cl;
|
|
|
|
printk("\n");
|
|
printk("EXCEPTION - %s: task %d; Linux trap # %d; signal = %d\n",
|
|
((from) ? from : "???"), current->pid, trapnr, signr);
|
|
|
|
asm volatile ("getcon " __EXPEVT ", %0":"=r"(ah));
|
|
asm volatile ("getcon " __EXPEVT ", %0":"=r"(al));
|
|
ah = (ah) >> 32;
|
|
al = (al) & 0xffffffff;
|
|
asm volatile ("getcon " __KCR1 ", %0":"=r"(bh));
|
|
asm volatile ("getcon " __KCR1 ", %0":"=r"(bl));
|
|
bh = (bh) >> 32;
|
|
bl = (bl) & 0xffffffff;
|
|
asm volatile ("getcon " __INTEVT ", %0":"=r"(ch));
|
|
asm volatile ("getcon " __INTEVT ", %0":"=r"(cl));
|
|
ch = (ch) >> 32;
|
|
cl = (cl) & 0xffffffff;
|
|
printk("EXPE: %08Lx%08Lx KCR1: %08Lx%08Lx INTE: %08Lx%08Lx\n",
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
asm volatile ("getcon " __PEXPEVT ", %0":"=r"(ah));
|
|
asm volatile ("getcon " __PEXPEVT ", %0":"=r"(al));
|
|
ah = (ah) >> 32;
|
|
al = (al) & 0xffffffff;
|
|
asm volatile ("getcon " __PSPC ", %0":"=r"(bh));
|
|
asm volatile ("getcon " __PSPC ", %0":"=r"(bl));
|
|
bh = (bh) >> 32;
|
|
bl = (bl) & 0xffffffff;
|
|
asm volatile ("getcon " __PSSR ", %0":"=r"(ch));
|
|
asm volatile ("getcon " __PSSR ", %0":"=r"(cl));
|
|
ch = (ch) >> 32;
|
|
cl = (cl) & 0xffffffff;
|
|
printk("PEXP: %08Lx%08Lx PSPC: %08Lx%08Lx PSSR: %08Lx%08Lx\n",
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
ah = (regs->pc) >> 32;
|
|
al = (regs->pc) & 0xffffffff;
|
|
bh = (regs->regs[18]) >> 32;
|
|
bl = (regs->regs[18]) & 0xffffffff;
|
|
ch = (regs->regs[15]) >> 32;
|
|
cl = (regs->regs[15]) & 0xffffffff;
|
|
printk("PC : %08Lx%08Lx LINK: %08Lx%08Lx SP : %08Lx%08Lx\n",
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
ah = (regs->sr) >> 32;
|
|
al = (regs->sr) & 0xffffffff;
|
|
asm volatile ("getcon " __TEA ", %0":"=r"(bh));
|
|
asm volatile ("getcon " __TEA ", %0":"=r"(bl));
|
|
bh = (bh) >> 32;
|
|
bl = (bl) & 0xffffffff;
|
|
asm volatile ("getcon " __KCR0 ", %0":"=r"(ch));
|
|
asm volatile ("getcon " __KCR0 ", %0":"=r"(cl));
|
|
ch = (ch) >> 32;
|
|
cl = (cl) & 0xffffffff;
|
|
printk("SR : %08Lx%08Lx TEA : %08Lx%08Lx KCR0: %08Lx%08Lx\n",
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
ah = (regs->regs[0]) >> 32;
|
|
al = (regs->regs[0]) & 0xffffffff;
|
|
bh = (regs->regs[1]) >> 32;
|
|
bl = (regs->regs[1]) & 0xffffffff;
|
|
ch = (regs->regs[2]) >> 32;
|
|
cl = (regs->regs[2]) & 0xffffffff;
|
|
printk("R0 : %08Lx%08Lx R1 : %08Lx%08Lx R2 : %08Lx%08Lx\n",
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
ah = (regs->regs[3]) >> 32;
|
|
al = (regs->regs[3]) & 0xffffffff;
|
|
bh = (regs->regs[4]) >> 32;
|
|
bl = (regs->regs[4]) & 0xffffffff;
|
|
ch = (regs->regs[5]) >> 32;
|
|
cl = (regs->regs[5]) & 0xffffffff;
|
|
printk("R3 : %08Lx%08Lx R4 : %08Lx%08Lx R5 : %08Lx%08Lx\n",
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
ah = (regs->regs[6]) >> 32;
|
|
al = (regs->regs[6]) & 0xffffffff;
|
|
bh = (regs->regs[7]) >> 32;
|
|
bl = (regs->regs[7]) & 0xffffffff;
|
|
ch = (regs->regs[8]) >> 32;
|
|
cl = (regs->regs[8]) & 0xffffffff;
|
|
printk("R6 : %08Lx%08Lx R7 : %08Lx%08Lx R8 : %08Lx%08Lx\n",
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
ah = (regs->regs[9]) >> 32;
|
|
al = (regs->regs[9]) & 0xffffffff;
|
|
bh = (regs->regs[10]) >> 32;
|
|
bl = (regs->regs[10]) & 0xffffffff;
|
|
ch = (regs->regs[11]) >> 32;
|
|
cl = (regs->regs[11]) & 0xffffffff;
|
|
printk("R9 : %08Lx%08Lx R10 : %08Lx%08Lx R11 : %08Lx%08Lx\n",
|
|
ah, al, bh, bl, ch, cl);
|
|
printk("....\n");
|
|
|
|
ah = (regs->tregs[0]) >> 32;
|
|
al = (regs->tregs[0]) & 0xffffffff;
|
|
bh = (regs->tregs[1]) >> 32;
|
|
bl = (regs->tregs[1]) & 0xffffffff;
|
|
ch = (regs->tregs[2]) >> 32;
|
|
cl = (regs->tregs[2]) & 0xffffffff;
|
|
printk("T0 : %08Lx%08Lx T1 : %08Lx%08Lx T2 : %08Lx%08Lx\n",
|
|
ah, al, bh, bl, ch, cl);
|
|
printk("....\n");
|
|
|
|
print_dtlb();
|
|
print_itlb();
|
|
}
|
|
|
|
/* ======================================================================= */
|
|
|
|
/*
|
|
** Depending on <base> scan the MMU, Data or Instruction side
|
|
** looking for a valid mapping matching Eaddr & asid.
|
|
** Return -1 if not found or the TLB id entry otherwise.
|
|
** Note: it works only for 4k pages!
|
|
*/
|
|
static unsigned long
|
|
lookup_mmu_side(unsigned long base, unsigned long Eaddr, unsigned long asid)
|
|
{
|
|
regType_t pteH;
|
|
unsigned long epn;
|
|
int count;
|
|
|
|
epn = Eaddr & 0xfffff000;
|
|
|
|
for (count = 0; count < MAX_TLBs; count++, base += TLB_STEP) {
|
|
pteH = getConfigReg(base);
|
|
if (GET_VALID(pteH))
|
|
if ((unsigned long) GET_EPN(pteH) == epn)
|
|
if ((unsigned long) GET_ASID(pteH) == asid)
|
|
break;
|
|
}
|
|
return ((unsigned long) ((count < MAX_TLBs) ? base : -1));
|
|
}
|
|
|
|
unsigned long lookup_dtlb(unsigned long Eaddr)
|
|
{
|
|
unsigned long asid = get_asid();
|
|
return (lookup_mmu_side((u64) DTLB_BASE, Eaddr, asid));
|
|
}
|
|
|
|
unsigned long lookup_itlb(unsigned long Eaddr)
|
|
{
|
|
unsigned long asid = get_asid();
|
|
return (lookup_mmu_side((u64) ITLB_BASE, Eaddr, asid));
|
|
}
|
|
|
|
void print_page(struct page *page)
|
|
{
|
|
printk(" page[%p] -> index 0x%lx, count 0x%x, flags 0x%lx\n",
|
|
page, page->index, page_count(page), page->flags);
|
|
printk(" address_space = %p, pages =%ld\n", page->mapping,
|
|
page->mapping->nrpages);
|
|
|
|
}
|