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-rw-r--r--src/target/xscale.c129
-rw-r--r--src/target/xscale.h24
2 files changed, 65 insertions, 88 deletions
diff --git a/src/target/xscale.c b/src/target/xscale.c
index f245a20..fca578d 100644
--- a/src/target/xscale.c
+++ b/src/target/xscale.c
@@ -202,23 +202,23 @@ static int xscale_read_dcsr(target_t *target)
uint8_t field2_check_mask = 0x1;
jtag_set_end_state(TAP_DRPAUSE);
- xscale_jtag_set_instr(xscale->jtag_info.tap, xscale->jtag_info.dcsr);
+ xscale_jtag_set_instr(target->tap, XSCALE_SELDCSR);
buf_set_u32(&field0, 1, 1, xscale->hold_rst);
buf_set_u32(&field0, 2, 1, xscale->external_debug_break);
- fields[0].tap = xscale->jtag_info.tap;
+ fields[0].tap = target->tap;
fields[0].num_bits = 3;
fields[0].out_value = &field0;
uint8_t tmp;
fields[0].in_value = &tmp;
- fields[1].tap = xscale->jtag_info.tap;
+ fields[1].tap = target->tap;
fields[1].num_bits = 32;
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].tap = target->tap;
fields[2].num_bits = 1;
fields[2].out_value = &field2;
uint8_t tmp2;
@@ -267,12 +267,8 @@ static int xscale_receive(target_t *target, uint32_t *buffer, int num_words)
return ERROR_INVALID_ARGUMENTS;
int retval = ERROR_OK;
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
tap_state_t path[3];
scan_field_t fields[3];
-
uint8_t *field0 = malloc(num_words * 1);
uint8_t field0_check_value = 0x2;
uint8_t field0_check_mask = 0x6;
@@ -288,20 +284,20 @@ static int xscale_receive(target_t *target, uint32_t *buffer, int num_words)
path[1] = TAP_DRCAPTURE;
path[2] = TAP_DRSHIFT;
- fields[0].tap = xscale->jtag_info.tap;
+ fields[0].tap = target->tap;
fields[0].num_bits = 3;
fields[0].out_value = NULL;
fields[0].in_value = NULL;
fields[0].check_value = &field0_check_value;
fields[0].check_mask = &field0_check_mask;
- fields[1].tap = xscale->jtag_info.tap;
+ fields[1].tap = target->tap;
fields[1].num_bits = 32;
fields[1].out_value = NULL;
fields[1].check_value = NULL;
fields[1].check_mask = NULL;
- fields[2].tap = xscale->jtag_info.tap;
+ fields[2].tap = target->tap;
fields[2].num_bits = 1;
fields[2].out_value = NULL;
fields[2].in_value = NULL;
@@ -309,7 +305,7 @@ static int xscale_receive(target_t *target, uint32_t *buffer, int num_words)
fields[2].check_mask = &field2_check_mask;
jtag_set_end_state(TAP_IDLE);
- xscale_jtag_set_instr(xscale->jtag_info.tap, xscale->jtag_info.dbgtx);
+ xscale_jtag_set_instr(target->tap, XSCALE_DBGTX);
jtag_add_runtest(1, jtag_get_end_state()); /* ensures that we're in the TAP_IDLE state as the above could be a no-op */
/* repeat until all words have been collected */
@@ -394,7 +390,7 @@ static int xscale_read_tx(target_t *target, int consume)
jtag_set_end_state(TAP_IDLE);
- xscale_jtag_set_instr(xscale->jtag_info.tap, xscale->jtag_info.dbgtx);
+ xscale_jtag_set_instr(target->tap, XSCALE_DBGTX);
path[0] = TAP_DRSELECT;
path[1] = TAP_DRCAPTURE;
@@ -407,17 +403,17 @@ static int xscale_read_tx(target_t *target, int consume)
noconsume_path[4] = TAP_DREXIT2;
noconsume_path[5] = TAP_DRSHIFT;
- fields[0].tap = xscale->jtag_info.tap;
+ fields[0].tap = target->tap;
fields[0].num_bits = 3;
fields[0].out_value = NULL;
fields[0].in_value = &field0_in;
- fields[1].tap = xscale->jtag_info.tap;
+ fields[1].tap = target->tap;
fields[1].num_bits = 32;
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].tap = target->tap;
fields[2].num_bits = 1;
fields[2].out_value = NULL;
uint8_t tmp;
@@ -496,19 +492,19 @@ static int xscale_write_rx(target_t *target)
jtag_set_end_state(TAP_IDLE);
- xscale_jtag_set_instr(xscale->jtag_info.tap, xscale->jtag_info.dbgrx);
+ xscale_jtag_set_instr(target->tap, XSCALE_DBGRX);
- fields[0].tap = xscale->jtag_info.tap;
+ fields[0].tap = target->tap;
fields[0].num_bits = 3;
fields[0].out_value = &field0_out;
fields[0].in_value = &field0_in;
- fields[1].tap = xscale->jtag_info.tap;
+ fields[1].tap = target->tap;
fields[1].num_bits = 32;
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].tap = target->tap;
fields[2].num_bits = 1;
fields[2].out_value = &field2;
uint8_t tmp;
@@ -567,18 +563,14 @@ static int xscale_write_rx(target_t *target)
/* send count elements of size byte to the debug handler */
static int xscale_send(target_t *target, uint8_t *buffer, int count, int size)
{
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
uint32_t t[3];
int bits[3];
-
int retval;
-
int done_count = 0;
jtag_set_end_state(TAP_IDLE);
- xscale_jtag_set_instr(xscale->jtag_info.tap, xscale->jtag_info.dbgrx);
+ xscale_jtag_set_instr(target->tap, XSCALE_DBGRX);
bits[0]=3;
t[0]=0;
@@ -615,7 +607,7 @@ static int xscale_send(target_t *target, uint8_t *buffer, int count, int size)
LOG_ERROR("BUG: size neither 4, 2 nor 1");
exit(-1);
}
- jtag_add_dr_out(xscale->jtag_info.tap,
+ jtag_add_dr_out(target->tap,
3,
bits,
t,
@@ -663,23 +655,23 @@ static int xscale_write_dcsr(target_t *target, int hold_rst, int ext_dbg_brk)
xscale->external_debug_break = ext_dbg_brk;
jtag_set_end_state(TAP_IDLE);
- xscale_jtag_set_instr(xscale->jtag_info.tap, xscale->jtag_info.dcsr);
+ xscale_jtag_set_instr(target->tap, XSCALE_SELDCSR);
buf_set_u32(&field0, 1, 1, xscale->hold_rst);
buf_set_u32(&field0, 2, 1, xscale->external_debug_break);
- fields[0].tap = xscale->jtag_info.tap;
+ fields[0].tap = target->tap;
fields[0].num_bits = 3;
fields[0].out_value = &field0;
uint8_t tmp;
fields[0].in_value = &tmp;
- fields[1].tap = xscale->jtag_info.tap;
+ fields[1].tap = target->tap;
fields[1].num_bits = 32;
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].tap = target->tap;
fields[2].num_bits = 1;
fields[2].out_value = &field2;
uint8_t tmp2;
@@ -716,19 +708,16 @@ static unsigned int parity (unsigned int v)
static int xscale_load_ic(target_t *target, uint32_t va, uint32_t buffer[8])
{
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
uint8_t packet[4];
uint8_t cmd;
int word;
-
scan_field_t fields[2];
LOG_DEBUG("loading miniIC at 0x%8.8" PRIx32 "", va);
/* LDIC into IR */
jtag_set_end_state(TAP_IDLE);
- xscale_jtag_set_instr(xscale->jtag_info.tap, xscale->jtag_info.ldic);
+ xscale_jtag_set_instr(target->tap, XSCALE_LDIC);
/* CMD is b011 to load a cacheline into the Mini ICache.
* Loading into the main ICache is deprecated, and unused.
@@ -739,12 +728,12 @@ static int xscale_load_ic(target_t *target, uint32_t va, uint32_t buffer[8])
/* virtual address of desired cache line */
buf_set_u32(packet, 0, 27, va >> 5);
- fields[0].tap = xscale->jtag_info.tap;
+ fields[0].tap = target->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].tap = target->tap;
fields[1].num_bits = 27;
fields[1].out_value = packet;
fields[1].in_value = NULL;
@@ -774,15 +763,12 @@ static int xscale_load_ic(target_t *target, uint32_t va, uint32_t buffer[8])
static int xscale_invalidate_ic_line(target_t *target, uint32_t va)
{
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
uint8_t packet[4];
uint8_t cmd;
-
scan_field_t fields[2];
jtag_set_end_state(TAP_IDLE);
- xscale_jtag_set_instr(xscale->jtag_info.tap, xscale->jtag_info.ldic); /* LDIC */
+ xscale_jtag_set_instr(target->tap, XSCALE_LDIC);
/* CMD for invalidate IC line b000, bits [6:4] b000 */
buf_set_u32(&cmd, 0, 6, 0x0);
@@ -790,12 +776,12 @@ static int xscale_invalidate_ic_line(target_t *target, uint32_t va)
/* virtual address of desired cache line */
buf_set_u32(packet, 0, 27, va >> 5);
- fields[0].tap = xscale->jtag_info.tap;
+ fields[0].tap = target->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].tap = target->tap;
fields[1].num_bits = 27;
fields[1].out_value = packet;
fields[1].in_value = NULL;
@@ -1539,7 +1525,7 @@ static int xscale_assert_reset(target_t *target)
* end up in T-L-R, which would reset JTAG
*/
jtag_set_end_state(TAP_IDLE);
- xscale_jtag_set_instr(xscale->jtag_info.tap, xscale->jtag_info.dcsr);
+ xscale_jtag_set_instr(target->tap, XSCALE_SELDCSR);
/* set Hold reset, Halt mode and Trap Reset */
buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
@@ -1547,7 +1533,7 @@ static int xscale_assert_reset(target_t *target)
xscale_write_dcsr(target, 1, 0);
/* select BYPASS, because having DCSR selected caused problems on the PXA27x */
- xscale_jtag_set_instr(xscale->jtag_info.tap, 0x7f);
+ xscale_jtag_set_instr(target->tap, 0x7f);
jtag_execute_queue();
/* assert reset */
@@ -2948,6 +2934,7 @@ static void xscale_build_reg_cache(target_t *target)
static int xscale_init_target(struct command_context_s *cmd_ctx,
struct target_s *target)
{
+ xscale_build_reg_cache(target);
return ERROR_OK;
}
@@ -2970,29 +2957,28 @@ static int xscale_init_arch_info(target_t *target,
xscale->arch_info = NULL;
xscale->common_magic = XSCALE_COMMON_MAGIC;
- /* remember the variant (PXA25x, PXA27x, IXP42x, ...) */
- xscale->variant = strdup(variant);
-
- /* prepare JTAG information for the new target */
- xscale->jtag_info.tap = tap;
-
- xscale->jtag_info.dbgrx = 0x02;
- xscale->jtag_info.dbgtx = 0x10;
- xscale->jtag_info.dcsr = 0x09;
- xscale->jtag_info.ldic = 0x07;
+ /* we don't really *need* variant info ... */
+ if (variant) {
+ int ir_length = 0;
+
+ if (strcmp(variant, "pxa250") == 0
+ || strcmp(variant, "pxa255") == 0
+ || strcmp(variant, "pxa26x") == 0)
+ ir_length = 5;
+ else if (strcmp(variant, "pxa27x") == 0
+ || strcmp(variant, "ixp42x") == 0
+ || strcmp(variant, "ixp45x") == 0
+ || strcmp(variant, "ixp46x") == 0)
+ ir_length = 7;
+ else
+ LOG_WARNING("%s: unrecognized variant %s",
+ tap->dotted_name, variant);
- if ((strcmp(xscale->variant, "pxa250") == 0) ||
- (strcmp(xscale->variant, "pxa255") == 0) ||
- (strcmp(xscale->variant, "pxa26x") == 0))
- {
- xscale->jtag_info.ir_length = 5;
- }
- else if ((strcmp(xscale->variant, "pxa27x") == 0) ||
- (strcmp(xscale->variant, "ixp42x") == 0) ||
- (strcmp(xscale->variant, "ixp45x") == 0) ||
- (strcmp(xscale->variant, "ixp46x") == 0))
- {
- xscale->jtag_info.ir_length = 7;
+ if (ir_length && ir_length != tap->ir_length) {
+ LOG_WARNING("%s: IR length for %s is %d; fixing",
+ tap->dotted_name, variant, ir_length);
+ tap->ir_length = ir_length;
+ }
}
/* the debug handler isn't installed (and thus not running) at this time */
@@ -3066,15 +3052,16 @@ static int xscale_init_arch_info(target_t *target,
return ERROR_OK;
}
-/* target xscale <endianess> <startup_mode> <chain_pos> <variant> */
static int xscale_target_create(struct target_s *target, Jim_Interp *interp)
{
- xscale_common_t *xscale = calloc(1,sizeof(xscale_common_t));
+ xscale_common_t *xscale;
- xscale_init_arch_info(target, xscale, target->tap, target->variant);
- xscale_build_reg_cache(target);
+ xscale = calloc(1, sizeof(*xscale));
+ if (!xscale)
+ return ERROR_FAIL;
- return ERROR_OK;
+ return xscale_init_arch_info(target, xscale, target->tap,
+ target->variant);
}
static int
diff --git a/src/target/xscale.h b/src/target/xscale.h
index 6cfe76e..a5d83ee 100644
--- a/src/target/xscale.h
+++ b/src/target/xscale.h
@@ -29,18 +29,13 @@
#define XSCALE_COMMON_MAGIC 0x58534341
-typedef struct xscale_jtag_s
-{
- /* position in JTAG scan chain */
- jtag_tap_t *tap;
-
- /* IR length and instructions */
- int ir_length;
- uint32_t dbgrx;
- uint32_t dbgtx;
- uint32_t ldic;
- uint32_t dcsr;
-} xscale_jtag_t;
+/* These four JTAG instructions are architecturally defined.
+ * Lengths are core-specific; originally 5 bits, later 7.
+ */
+#define XSCALE_DBGRX 0x02
+#define XSCALE_DBGTX 0x10
+#define XSCALE_LDIC 0x07
+#define XSCALE_SELDCSR 0x09
enum xscale_debug_reason
{
@@ -90,11 +85,6 @@ typedef struct xscale_common_s
/* XScale registers (CP15, DBG) */
reg_cache_t *reg_cache;
- /* pxa250, pxa255, pxa27x, ixp42x, ... */
- char *variant;
-
- xscale_jtag_t jtag_info;
-
/* current state of the debug handler */
int handler_installed;
int handler_running;
generated by cgit v1.1 at 2024-11-01 15:45:19 +0000