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CortexA8: Implement debug base autodetection 

Implement autodetection of debug base. Also, implement a function solving
various hardware quirks (like iMX51 ROM Table location bug).

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
This commit is contained in:
Marek Vasut 2010-10-29 02:57:32 +02:00
parent 887cac65b0
commit 1fa91f336a
1 changed files with 12 additions and 7 deletions
src/target
cortex_a8.c

19
src/target/cortex_a8.c
View File

@ -73,7 +73,6 @@ static int cortex_a8_get_ttb(struct target *target, uint32_t *result);
*/
#define swjdp_memoryap 0
#define swjdp_debugap 1
#define OMAP3530_DEBUG_BASE 0x54011000
/*
* Cortex-A8 Basic debug access, very low level assumes state is saved
@ -1714,12 +1713,7 @@ static int cortex_a8_examine_first(struct target *target)
int i;
int retval = ERROR_OK;
uint32_t didr, ctypr, ttypr, cpuid;
/* stop assuming this is an OMAP! */
LOG_DEBUG("TODO - autoconfigure");
/* Here we shall insert a proper ROM Table scan */
armv7a->debug_base = OMAP3530_DEBUG_BASE;
uint32_t dbgbase, apid;
/* We do one extra read to ensure DAP is configured,
* we call ahbap_debugport_init(swjdp) instead
@ -1728,6 +1722,17 @@ static int cortex_a8_examine_first(struct target *target)
if (retval != ERROR_OK)
return retval;
/* Get ROM Table base */
retval = dap_get_debugbase(swjdp, 1, &dbgbase, &apid);
if (retval != ERROR_OK)
return retval;
/* Lookup 0x15 -- Processor DAP */
retval = dap_lookup_cs_component(swjdp, 1, dbgbase, 0x15,
&armv7a->debug_base);
if (retval != ERROR_OK)
return retval;
retval = mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_CPUID, &cpuid);
if (retval != ERROR_OK)
return retval;