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Diffstat (limited to 'cpu/blackfin/traps.c')
-rw-r--r--cpu/blackfin/traps.c106
1 files changed, 66 insertions, 40 deletions
diff --git a/cpu/blackfin/traps.c b/cpu/blackfin/traps.c
index 4474fe5..a2c6f1e 100644
--- a/cpu/blackfin/traps.c
+++ b/cpu/blackfin/traps.c
@@ -111,23 +111,12 @@ void trap_c(struct pt_regs *regs)
}
if (i == ARRAY_SIZE(bfin_memory_map)) {
printf("%cCPLB exception outside of memory map at 0x%p\n",
- (data ? 'D' : 'I'), new_cplb_addr);
+ (data ? 'D' : 'I'), (void *)new_cplb_addr);
bfin_panic(regs);
} else
debug("CPLB addr %p matches map 0x%p - 0x%p\n", new_cplb_addr, bfin_memory_map[i].start, bfin_memory_map[i].end);
new_cplb_data = (data ? bfin_memory_map[i].data_flags : bfin_memory_map[i].inst_flags);
- /* Turn the cache off */
- SSYNC();
- if (data) {
- asm(" .align 8; ");
- *pDMEM_CONTROL &= ~ENDCPLB;
- } else {
- asm(" .align 8; ");
- *pIMEM_CONTROL &= ~ENICPLB;
- }
- SSYNC();
-
if (data) {
CPLB_ADDR_BASE = (uint32_t *)DCPLB_ADDR0;
CPLB_DATA_BASE = (uint32_t *)DCPLB_DATA0;
@@ -149,8 +138,17 @@ void trap_c(struct pt_regs *regs)
debug("evicting entry %i: 0x%p 0x%08X\n", i, *CPLB_ADDR, *CPLB_DATA);
last_evicted = i + 1;
+
+ /* need to turn off cplbs whenever we muck with the cplb table */
+#if ENDCPLB != ENICPLB
+# error cplb enable bit violates my sanity
+#endif
+ uint32_t mem_control = (data ? DMEM_CONTROL : IMEM_CONTROL);
+ bfin_write32(mem_control, bfin_read32(mem_control) & ~ENDCPLB);
*CPLB_ADDR = new_cplb_addr;
*CPLB_DATA = new_cplb_data;
+ bfin_write32(mem_control, bfin_read32(mem_control) | ENDCPLB);
+ SSYNC();
/* dump current table for debugging purposes */
CPLB_ADDR = CPLB_ADDR_BASE;
@@ -158,17 +156,6 @@ void trap_c(struct pt_regs *regs)
for (i = 0; i < 16; ++i)
debug("%2i 0x%p 0x%08X\n", i, *CPLB_ADDR++, *CPLB_DATA++);
- /* Turn the cache back on */
- SSYNC();
- if (data) {
- asm(" .align 8; ");
- *pDMEM_CONTROL |= ENDCPLB;
- } else {
- asm(" .align 8; ");
- *pIMEM_CONTROL |= ENICPLB;
- }
- SSYNC();
-
break;
}
@@ -220,35 +207,77 @@ static const char *symbol_lookup(unsigned long addr, unsigned long *caddr)
static void decode_address(char *buf, unsigned long address)
{
unsigned long sym_addr;
+ void *paddr = (void *)address;
const char *sym = symbol_lookup(address, &sym_addr);
if (sym) {
- sprintf(buf, "<0x%p> { %s + 0x%x }", address, sym, address - sym_addr);
+ sprintf(buf, "<0x%p> { %s + 0x%lx }", paddr, sym, address - sym_addr);
return;
}
if (!address)
- sprintf(buf, "<0x%p> /* Maybe null pointer? */", address);
- else if (address >= CFG_MONITOR_BASE &&
- address < CFG_MONITOR_BASE + CFG_MONITOR_LEN)
- sprintf(buf, "<0x%p> /* somewhere in u-boot */", address);
+ sprintf(buf, "<0x%p> /* Maybe null pointer? */", paddr);
+ else if (address >= CONFIG_SYS_MONITOR_BASE &&
+ address < CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)
+ sprintf(buf, "<0x%p> /* somewhere in u-boot */", paddr);
else
- sprintf(buf, "<0x%p> /* unknown address */", address);
+ sprintf(buf, "<0x%p> /* unknown address */", paddr);
+}
+
+static char *strhwerrcause(uint16_t hwerrcause)
+{
+ switch (hwerrcause) {
+ case 0x02: return "system mmr error";
+ case 0x03: return "external memory addressing error";
+ case 0x12: return "performance monitor overflow";
+ case 0x18: return "raise 5 instruction";
+ default: return "undef";
+ }
+}
+
+static char *strexcause(uint16_t excause)
+{
+ switch (excause) {
+ case 0x00 ... 0xf: return "custom exception";
+ case 0x10: return "single step";
+ case 0x11: return "trace buffer full";
+ case 0x21: return "undef inst";
+ case 0x22: return "illegal inst";
+ case 0x23: return "dcplb prot violation";
+ case 0x24: return "misaligned data";
+ case 0x25: return "unrecoverable event";
+ case 0x26: return "dcplb miss";
+ case 0x27: return "multiple dcplb hit";
+ case 0x28: return "emulation watchpoint";
+ case 0x2a: return "misaligned inst";
+ case 0x2b: return "icplb prot violation";
+ case 0x2c: return "icplb miss";
+ case 0x2d: return "multiple icplb hit";
+ case 0x2e: return "illegal use of supervisor resource";
+ default: return "undef";
+ }
}
void dump(struct pt_regs *fp)
{
char buf[150];
- size_t i;
+ int i;
+ uint16_t hwerrcause, excause;
if (!ENABLE_DUMP)
return;
+ /* fp->ipend is garbage, so load it ourself */
+ fp->ipend = bfin_read_IPEND();
+
+ hwerrcause = (fp->seqstat & HWERRCAUSE) >> HWERRCAUSE_P;
+ excause = (fp->seqstat & EXCAUSE) >> EXCAUSE_P;
+
printf("SEQUENCER STATUS:\n");
printf(" SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n",
fp->seqstat, fp->ipend, fp->syscfg);
- printf(" HWERRCAUSE: 0x%lx\n", (fp->seqstat & HWERRCAUSE) >> HWERRCAUSE_P);
- printf(" EXCAUSE : 0x%lx\n", (fp->seqstat & EXCAUSE) >> EXCAUSE_P);
+ printf(" HWERRCAUSE: 0x%x: %s\n", hwerrcause, strhwerrcause(hwerrcause));
+ printf(" EXCAUSE : 0x%x: %s\n", excause, strexcause(excause));
for (i = 6; i <= 15; ++i) {
if (fp->ipend & (1 << i)) {
decode_address(buf, bfin_read32(EVT0 + 4*i));
@@ -263,8 +292,9 @@ void dump(struct pt_regs *fp)
printf(" RETX: %s\n", buf);
decode_address(buf, fp->rets);
printf(" RETS: %s\n", buf);
+ /* we lie and store RETI in "pc" */
decode_address(buf, fp->pc);
- printf(" PC : %s\n", buf);
+ printf(" RETI: %s\n", buf);
if (fp->seqstat & EXCAUSE) {
decode_address(buf, bfin_read_DCPLB_FAULT_ADDR());
@@ -281,7 +311,7 @@ void dump(struct pt_regs *fp)
printf(" P0 : %08lx P1 : %08lx P2 : %08lx P3 : %08lx\n",
fp->p0, fp->p1, fp->p2, fp->p3);
printf(" P4 : %08lx P5 : %08lx FP : %08lx SP : %08lx\n",
- fp->p4, fp->p5, fp->fp, fp);
+ fp->p4, fp->p5, fp->fp, (unsigned long)fp);
printf(" LB0: %08lx LT0: %08lx LC0: %08lx\n",
fp->lb0, fp->lt0, fp->lc0);
printf(" LB1: %08lx LT1: %08lx LC1: %08lx\n",
@@ -307,7 +337,7 @@ void dump_bfin_trace_buffer(void)
{
char buf[150];
unsigned long tflags;
- size_t i = 0;
+ int i = 0;
if (!ENABLE_DUMP)
return;
@@ -344,10 +374,6 @@ void bfin_panic(struct pt_regs *regs)
);
dump(regs);
dump_bfin_trace_buffer();
- printf(
- "\n"
- "Please reset the board\n"
- "\n"
- );
+ puts("\n");
bfin_reset_or_hang();
}
generated by cgit v1.1 at 2025-01-03 01:07:53 +0000