*/
#include <common.h>
+#include <kgdb.h>
#include <linux/types.h>
#include <asm/traps.h>
#include <asm/cplb.h>
#include <asm/mach-common/bits/core.h>
#include <asm/mach-common/bits/mpu.h>
#include <asm/mach-common/bits/trace.h>
+#include <asm/deferred.h>
#include "cpu.h"
#define trace_buffer_save(x) \
}
};
-void trap_c(struct pt_regs *regs)
+#ifdef CONFIG_EXCEPTION_DEFER
+unsigned int deferred_regs[deferred_regs_last];
+#endif
+
+/*
+ * Handle all exceptions while running in EVT3 or EVT5
+ */
+int trap_c(struct pt_regs *regs, uint32_t level)
{
+ uint32_t ret = 0;
uint32_t trapnr = (regs->seqstat & EXCAUSE);
bool data = false;
*/
if (last_cplb_fault_retx != regs->retx) {
last_cplb_fault_retx = regs->retx;
- return;
+ return ret;
}
}
uint32_t new_cplb_addr = 0, new_cplb_data = 0;
static size_t last_evicted;
size_t i;
+ unsigned long tflags;
+
+#ifdef CONFIG_EXCEPTION_DEFER
+ /* This should never happen */
+ if (level == 5)
+ bfin_panic(regs);
+#endif
+
+ /*
+ * Keep the trace buffer so that a miss here points people
+ * to the right place (their code). Crashes here rarely
+ * happen. If they do, only the Blackfin maintainer cares.
+ */
+ trace_buffer_save(tflags);
new_cplb_addr = (data ? bfin_read_DCPLB_FAULT_ADDR() : bfin_read_ICPLB_FAULT_ADDR()) & ~(4 * 1024 * 1024 - 1);
}
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;
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;
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();
-
+ trace_buffer_restore(tflags);
break;
}
-
+#ifdef CONFIG_CMD_KGDB
+ /* Single step
+ * if we are in IRQ5, just ignore, otherwise defer, and handle it in kgdb
+ */
+ case VEC_STEP:
+ if (level == 3) {
+ /* If we just returned from an interrupt, the single step
+ * event is for the RTI instruction.
+ */
+ if (regs->retx == regs->pc)
+ break;
+ /* we just return if we are single stepping through IRQ5 */
+ if (regs->ipend & 0x20)
+ break;
+ /* Otherwise, turn single stepping off & fall through,
+ * which defers to IRQ5
+ */
+ regs->syscfg &= ~1;
+ }
+ /* fall through */
+#endif
default:
- /* All traps come here */
+#ifdef CONFIG_CMD_KGDB
+ if (level == 3) {
+ /* We need to handle this at EVT5, so try again */
+ ret = 1;
+ break;
+ }
+ if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+ return 0;
+#endif
bfin_panic(regs);
}
+ return ret;
}
#ifdef CONFIG_DEBUG_DUMP
# define ENABLE_DUMP 0
#endif
-#ifdef CONFIG_DEBUG_DUMP_SYMS
-# define ENABLE_DUMP_SYMS 1
-#else
-# define ENABLE_DUMP_SYMS 0
-#endif
-
-static const char *symbol_lookup(unsigned long addr, unsigned long *caddr)
+#ifndef CONFIG_KALLSYMS
+const char *symbol_lookup(unsigned long addr, unsigned long *caddr)
{
- if (!ENABLE_DUMP_SYMS)
- return NULL;
-
- extern const char system_map[] __attribute__((__weak__));
- const char *sym, *csym;
- char *esym;
- unsigned long sym_addr;
-
- sym = system_map;
- csym = NULL;
- *caddr = 0;
-
- while (*sym) {
- sym_addr = simple_strtoul(sym, &esym, 16);
- sym = esym + 1;
- if (sym_addr > addr)
- break;
- *caddr = sym_addr;
- csym = sym;
- sym += strlen(sym) + 1;
- }
-
- return csym;
+ *caddr = addr;
+ return "N/A";
}
+#endif
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);
+ 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 */", address);
+ 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)
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 */
+#ifndef CONFIG_CMD_KGDB
+ /* fp->ipend is normally garbage, so load it ourself */
fp->ipend = bfin_read_IPEND();
+#endif
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: %s\n", hwerrcause, strhwerrcause(hwerrcause));
- printf(" EXCAUSE : 0x%lx: %s\n", excause, strexcause(excause));
+ 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));
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",
{
char buf[150];
unsigned long tflags;
- size_t i = 0;
+ int i = 0;
if (!ENABLE_DUMP)
return;
projects / karo-tx-uboot.git / blobdiff