summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to 'src')
-rw-r--r--src/target/xscale.c74
1 files changed, 31 insertions, 43 deletions
diff --git a/src/target/xscale.c b/src/target/xscale.c
index 40126c92..b46b621e 100644
--- a/src/target/xscale.c
+++ b/src/target/xscale.c
@@ -35,6 +35,26 @@
#include "time_support.h"
#include "image.h"
+
+/*
+ * Important XScale documents available as of October 2009 include:
+ *
+ * Intel XScale® Core Developer’s Manual, January 2004
+ * Order Number: 273473-002
+ * This has a chapter detailing debug facilities, and punts some
+ * details to chip-specific microarchitecture documentats.
+ *
+ * Hot-Debug for Intel XScale® Core Debug White Paper, May 2005
+ * Document Number: 273539-005
+ * Less detailed than the developer's manual, but summarizes those
+ * missing details (for most XScales) and gives LOTS of notes about
+ * debugger/handler interaction issues. Presents a simpler reset
+ * and load-handler sequence than the arch doc. (Note, OpenOCD
+ * doesn't currently support "Hot-Debug" as defined there.)
+ *
+ * Chip-specific microarchitecture documents may also be useful.
+ */
+
/* cli handling */
int xscale_register_commands(struct command_context_s *cmd_ctx);
@@ -53,7 +73,6 @@ int xscale_restore_context(target_t *target);
int xscale_assert_reset(target_t *target);
int xscale_deassert_reset(target_t *target);
-int xscale_soft_reset_halt(struct target_s *target);
int xscale_set_reg_u32(reg_t *reg, uint32_t value);
@@ -92,7 +111,7 @@ target_type_t xscale_target =
.assert_reset = xscale_assert_reset,
.deassert_reset = xscale_deassert_reset,
- .soft_reset_halt = xscale_soft_reset_halt,
+ .soft_reset_halt = NULL,
.get_gdb_reg_list = armv4_5_get_gdb_reg_list,
@@ -118,7 +137,7 @@ target_type_t xscale_target =
.mmu = xscale_mmu
};
-char* xscale_reg_list[] =
+static char *const xscale_reg_list[] =
{
"XSCALE_MAINID", /* 0 */
"XSCALE_CACHETYPE",
@@ -144,7 +163,7 @@ char* xscale_reg_list[] =
"XSCALE_TXRXCTRL",
};
-xscale_reg_t xscale_reg_arch_info[] =
+static const xscale_reg_t xscale_reg_arch_info[] =
{
{XSCALE_MAINID, NULL},
{XSCALE_CACHETYPE, NULL},
@@ -170,7 +189,7 @@ xscale_reg_t xscale_reg_arch_info[] =
{-1, NULL}, /* TXRXCTRL implicit access via JTAG */
};
-int xscale_reg_arch_type = -1;
+static int xscale_reg_arch_type = -1;
int xscale_get_reg(reg_t *reg);
int xscale_set_reg(reg_t *reg, uint8_t *buf);
@@ -258,7 +277,6 @@ int xscale_read_dcsr(target_t *target)
fields[1].out_value = NULL;
fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
-
fields[2].tap = xscale->jtag_info.tap;
fields[2].num_bits = 1;
fields[2].out_value = &field2;
@@ -298,7 +316,7 @@ int xscale_read_dcsr(target_t *target)
static void xscale_getbuf(jtag_callback_data_t arg)
{
- uint8_t *in = (uint8_t *)arg;
+ uint8_t *in = (uint8_t *)arg;
*((uint32_t *)in) = buf_get_u32(in, 0, 32);
}
@@ -458,7 +476,6 @@ int xscale_read_tx(target_t *target, int consume)
fields[1].out_value = NULL;
fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_TX].value;
-
fields[2].tap = xscale->jtag_info.tap;
fields[2].num_bits = 1;
fields[2].out_value = NULL;
@@ -550,7 +567,6 @@ int xscale_write_rx(target_t *target)
fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_RX].value;
fields[1].in_value = NULL;
-
fields[2].tap = xscale->jtag_info.tap;
fields[2].num_bits = 1;
fields[2].out_value = &field2;
@@ -722,7 +738,6 @@ int xscale_write_dcsr(target_t *target, int hold_rst, int ext_dbg_brk)
fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
fields[1].in_value = NULL;
-
fields[2].tap = xscale->jtag_info.tap;
fields[2].num_bits = 1;
fields[2].out_value = &field2;
@@ -787,23 +802,13 @@ int xscale_load_ic(target_t *target, int mini, uint32_t va, uint32_t buffer[8])
fields[0].tap = xscale->jtag_info.tap;
fields[0].num_bits = 6;
fields[0].out_value = &cmd;
-
fields[0].in_value = NULL;
-
-
-
-
fields[1].tap = xscale->jtag_info.tap;
fields[1].num_bits = 27;
fields[1].out_value = packet;
-
fields[1].in_value = NULL;
-
-
-
-
jtag_add_dr_scan(2, fields, jtag_get_end_state());
fields[0].num_bits = 32;
@@ -823,9 +828,7 @@ int xscale_load_ic(target_t *target, int mini, uint32_t va, uint32_t buffer[8])
jtag_add_dr_scan(2, fields, jtag_get_end_state());
}
- jtag_execute_queue();
-
- return ERROR_OK;
+ return jtag_execute_queue();
}
int xscale_invalidate_ic_line(target_t *target, uint32_t va)
@@ -849,23 +852,13 @@ int xscale_invalidate_ic_line(target_t *target, uint32_t va)
fields[0].tap = xscale->jtag_info.tap;
fields[0].num_bits = 6;
fields[0].out_value = &cmd;
-
fields[0].in_value = NULL;
-
-
-
-
fields[1].tap = xscale->jtag_info.tap;
fields[1].num_bits = 27;
fields[1].out_value = packet;
-
fields[1].in_value = NULL;
-
-
-
-
jtag_add_dr_scan(2, fields, jtag_get_end_state());
return ERROR_OK;
@@ -941,12 +934,12 @@ int xscale_arch_state(struct target_s *target)
armv4_5_common_t *armv4_5 = target->arch_info;
xscale_common_t *xscale = armv4_5->arch_info;
- char *state[] =
+ static const char *state[] =
{
"disabled", "enabled"
};
- char *arch_dbg_reason[] =
+ static const char *arch_dbg_reason[] =
{
"", "\n(processor reset)", "\n(trace buffer full)"
};
@@ -1040,8 +1033,8 @@ int xscale_debug_entry(target_t *target)
/* move r0 from buffer to register cache */
buf_set_u32(armv4_5->core_cache->reg_list[0].value, 0, 32, buffer[0]);
- armv4_5->core_cache->reg_list[15].dirty = 1;
- armv4_5->core_cache->reg_list[15].valid = 1;
+ armv4_5->core_cache->reg_list[0].dirty = 1;
+ armv4_5->core_cache->reg_list[0].valid = 1;
LOG_DEBUG("r0: 0x%8.8" PRIx32 "", buffer[0]);
/* move pc from buffer to register cache */
@@ -1148,7 +1141,7 @@ int xscale_debug_entry(target_t *target)
xscale->arch_debug_reason = XSCALE_DBG_REASON_TB_FULL;
pc -= 4;
break;
- case 0x7: /* Reserved */
+ case 0x7: /* Reserved (may flag Hot-Debug support) */
default:
LOG_ERROR("Method of Entry is 'Reserved'");
exit(-1);
@@ -1748,11 +1741,6 @@ int xscale_deassert_reset(target_t *target)
return ERROR_OK;
}
-int xscale_soft_reset_halt(struct target_s *target)
-{
- return ERROR_OK;
-}
-
int xscale_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode)
{
return ERROR_OK;
generated by cgit v1.2.3 (git 2.46.0) at 2024-12-28 09:22:03 +0000