@@ -52,6 +52,20 @@ static uint64_t mfocrf(uint64_t reg, uint64_t cr)
return MFOCRF_OPCODE | (reg << 21) | (1U << (12 + cr));
}
+static uint64_t mtocrf(uint64_t cr, uint64_t reg)
+{
+ if (reg > 31) {
+ PR_ERROR("Invalid register specified for mfocrf\n");
+ exit(1);
+ }
+ if (cr > 7) {
+ PR_ERROR("Invalid CR field specified\n");
+ exit(1);
+ }
+
+ return MTOCRF_OPCODE | (reg << 21) | (1U << (12 + cr));
+}
+
static uint64_t mfnia(uint64_t reg)
{
if (reg > 31)
@@ -347,6 +361,28 @@ int ram_getcr(struct pdbg_target *thread, uint32_t *value)
return 0;
}
+int ram_putcr_field(struct pdbg_target *thread, int cr, uint32_t value)
+{
+ uint64_t opcodes[] = {mfspr(0, 277), mtocrf(cr, 0)};
+ uint64_t results[] = {value, 0};
+
+ CHECK_ERR(ram_instructions(thread, opcodes, results, ARRAY_SIZE(opcodes), 0));
+ return 0;
+}
+
+int ram_putcr(struct pdbg_target *thread, uint32_t value)
+{
+ uint32_t cr_field;
+ int i;
+
+ for (i = 0; i < 8; i++){
+ cr_field = value & (0xf << 4*i);
+ ram_putcr_field(thread, i, cr_field);
+ }
+
+ return 0;
+}
+
int ram_putmsr(struct pdbg_target *thread, uint64_t value)
{
uint64_t opcodes[] = {mfspr(0, 277), mtmsr(0)};
@@ -139,6 +139,7 @@ int ram_putspr(struct pdbg_target *target, int spr, uint64_t val);
int ram_putgpr(struct pdbg_target *target, int spr, uint64_t val);
int ram_getmsr(struct pdbg_target *target, uint64_t *val);
int ram_getcr(struct pdbg_target *thread, uint32_t *value);
+int ram_putcr(struct pdbg_target *thread, uint32_t value);
int ram_getnia(struct pdbg_target *target, uint64_t *val);
int ram_getspr(struct pdbg_target *target, int spr, uint64_t *val);
int ram_getgpr(struct pdbg_target *target, int gpr, uint64_t *val);
@@ -73,6 +73,7 @@
#define MFXERF2_OPCODE 0x00000210UL
#define MFXERF3_OPCODE 0x00000310UL
#define MFOCRF_OPCODE 0x7c100026UL
+#define MTOCRF_OPCODE 0x7C100120UL
#define MFSPR_MASK (MFSPR_OPCODE | ((0x1f) << 16) | ((0x3e0) << 6))
#define MFXER_OPCODE (MFSPR_OPCODE | ((1 & 0x1f) << 16) | ((1 & 0x3e0) << 6))
#define MTXER_OPCODE (MTSPR_OPCODE | ((1 & 0x1f) << 16) | ((1 & 0x3e0) << 6))
@@ -90,6 +90,8 @@ static int getprocreg(struct pdbg_target *target, uint32_t index, uint64_t *reg,
rc = ram_getnia(target, &value);
else if (*reg == REG_XER)
rc = ram_getxer(target, (uint32_t *)&value);
+ else if (*reg == REG_CR)
+ rc = ram_getcr(target, (uint32_t *)&value);
else if (*reg > REG_R31)
rc = ram_getspr(target, *reg - REG_R31, &value);
else if (*reg >= 0 && *reg <= 31)
Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com> --- libpdbg/chip.c | 36 ++++++++++++++++++++++++++++++++++++ libpdbg/libpdbg.h | 1 + libpdbg/operations.h | 1 + src/reg.c | 2 ++ 4 files changed, 40 insertions(+)