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>

diff --git a/src/target/cortex_a8.c b/src/target/cortex_a8.c
index 8b4ced59c0df17e84a4eb0c5533897b07f8a2213..3c80923fc08e7c0743bd65576303a60e6ba75ec6 100644 (file)
--- a/src/target/cortex_a8.c
+++ b/src/target/cortex_a8.c
@@ -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;