#include "target_request.h"
#include "target_type.h"
#include "arm_opcodes.h"
+#include <helper/time_support.h>
static int cortex_a8_poll(struct target *target);
static int cortex_a8_debug_entry(struct target *target);
uint32_t *value, int regnum);
static int cortex_a8_dap_write_coreregister_u32(struct target *target,
uint32_t value, int regnum);
+static int cortex_a8_mmu(struct target *target, int *enabled);
+static int cortex_a8_virt2phys(struct target *target,
+ uint32_t virt, uint32_t *phys);
+static void cortex_a8_disable_mmu_caches(struct target *target, int mmu,
+ int d_u_cache, int i_cache);
+static void cortex_a8_enable_mmu_caches(struct target *target, int mmu,
+ int d_u_cache, int i_cache);
+static uint32_t cortex_a8_get_ttb(struct target *target);
+
+
/*
* FIXME do topology discovery using the ROM; don't
* assume this is an OMAP3. Also, allow for multiple ARMv7-A
/* The debugport might be uninitialised so try twice */
retval = mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_LOCKACCESS, 0xC5ACCE55);
if (retval != ERROR_OK)
- mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_LOCKACCESS, 0xC5ACCE55);
+ {
+ /* try again */
+ retval = mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_LOCKACCESS, 0xC5ACCE55);
+ if (retval == ERROR_OK)
+ {
+ LOG_USER("Locking debug access failed on first, but succeeded on second try.");
+ }
+ }
+ if (retval != ERROR_OK)
+ return retval;
/* Clear Sticky Power Down status Bit in PRSR to enable access to
the registers in the Core Power Domain */
retval = mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_PRSR, &dummy);
+ if (retval != ERROR_OK)
+ return retval;
+
/* Enabling of instruction execution in debug mode is done in debug_entry code */
/* Resync breakpoint registers */
- /* Since this is likley called from init or reset, update targtet state information*/
- cortex_a8_poll(target);
+ /* Since this is likely called from init or reset, update target state information*/
+ retval = cortex_a8_poll(target);
return retval;
}
int retval;
/* set up invariant: INSTR_COMP is set after ever DPM operation */
- do {
+ long long then = timeval_ms();
+ for (;;)
+ {
retval = mem_ap_read_atomic_u32(swjdp,
a8->armv7a_common.debug_base + CPUDBG_DSCR,
&dscr);
- } while ((dscr & DSCR_INSTR_COMP) == 0);
+ if (retval != ERROR_OK)
+ return retval;
+ if ((dscr & DSCR_INSTR_COMP) != 0)
+ break;
+ if (timeval_ms() > then + 1000)
+ {
+ LOG_ERROR("Timeout waiting for dpm prepare");
+ return ERROR_FAIL;
+ }
+ }
/* this "should never happen" ... */
if (dscr & DSCR_DTR_RX_FULL) {
return cortex_a8_read_dcc(a8, data, &dscr);
}
-static int cortex_a8_bpwp_enable(struct arm_dpm *dpm, unsigned index,
+static int cortex_a8_bpwp_enable(struct arm_dpm *dpm, unsigned index_t,
uint32_t addr, uint32_t control)
{
struct cortex_a8_common *a8 = dpm_to_a8(dpm);
uint32_t cr = a8->armv7a_common.debug_base;
int retval;
- switch (index) {
+ switch (index_t) {
case 0 ... 15: /* breakpoints */
vr += CPUDBG_BVR_BASE;
cr += CPUDBG_BCR_BASE;
case 16 ... 31: /* watchpoints */
vr += CPUDBG_WVR_BASE;
cr += CPUDBG_WCR_BASE;
- index -= 16;
+ index_t -= 16;
break;
default:
return ERROR_FAIL;
}
- vr += 4 * index;
- cr += 4 * index;
+ vr += 4 * index_t;
+ cr += 4 * index_t;
LOG_DEBUG("A8: bpwp enable, vr %08x cr %08x",
(unsigned) vr, (unsigned) cr);
return retval;
}
-static int cortex_a8_bpwp_disable(struct arm_dpm *dpm, unsigned index)
+static int cortex_a8_bpwp_disable(struct arm_dpm *dpm, unsigned index_t)
{
struct cortex_a8_common *a8 = dpm_to_a8(dpm);
uint32_t cr;
- switch (index) {
+ switch (index_t) {
case 0 ... 15:
cr = a8->armv7a_common.debug_base + CPUDBG_BCR_BASE;
break;
case 16 ... 31:
cr = a8->armv7a_common.debug_base + CPUDBG_WCR_BASE;
- index -= 16;
+ index_t -= 16;
break;
default:
return ERROR_FAIL;
}
- cr += 4 * index;
+ cr += 4 * index_t;
LOG_DEBUG("A8: bpwp disable, cr %08x", (unsigned) cr);
*/
retval = mem_ap_write_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DRCR, 0x1);
+ if (retval != ERROR_OK)
+ goto out;
/*
* enter halting debug mode
*/
- mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_DSCR, &dscr);
+ retval = mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ goto out;
+
retval = mem_ap_write_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DSCR, dscr | DSCR_HALT_DBG_MODE);
-
if (retval != ERROR_OK)
goto out;
- do {
- mem_ap_read_atomic_u32(swjdp,
+ long long then = timeval_ms();
+ for (;;)
+ {
+ retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DSCR, &dscr);
- } while ((dscr & DSCR_CORE_HALTED) == 0);
+ if (retval != ERROR_OK)
+ goto out;
+ if ((dscr & DSCR_CORE_HALTED) != 0)
+ {
+ break;
+ }
+ if (timeval_ms() > then + 1000)
+ {
+ LOG_ERROR("Timeout waiting for halt");
+ return ERROR_FAIL;
+ }
+ }
target->debug_reason = DBG_REASON_DBGRQ;
struct armv7a_common *armv7a = target_to_armv7a(target);
struct arm *armv4_5 = &armv7a->armv4_5_common;
struct adiv5_dap *swjdp = &armv7a->dap;
+ int retval;
// struct breakpoint *breakpoint = NULL;
uint32_t resume_pc, dscr;
* REVISIT: for single stepping, we probably want to
* disable IRQs by default, with optional override...
*/
- mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_DRCR, 0x2);
+ retval = mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_DRCR, 0x2);
+ if (retval != ERROR_OK)
+ return retval;
- do {
- mem_ap_read_atomic_u32(swjdp,
+ long long then = timeval_ms();
+ for (;;)
+ {
+ retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DSCR, &dscr);
- } while ((dscr & DSCR_CORE_RESTARTED) == 0);
+ if (retval != ERROR_OK)
+ return retval;
+ if ((dscr & DSCR_CORE_RESTARTED) != 0)
+ break;
+ if (timeval_ms() > then + 1000)
+ {
+ LOG_ERROR("Timeout waiting for resume");
+ return ERROR_FAIL;
+ }
+ }
target->debug_reason = DBG_REASON_NOTHALTED;
target->state = TARGET_RUNNING;
LOG_DEBUG("dscr = 0x%08" PRIx32, cortex_a8->cpudbg_dscr);
/* REVISIT surely we should not re-read DSCR !! */
- mem_ap_read_atomic_u32(swjdp,
+ retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ return retval;
/* REVISIT see A8 TRM 12.11.4 steps 2..3 -- make sure that any
* imprecise data aborts get discarded by issuing a Data
dscr |= DSCR_ITR_EN;
retval = mem_ap_write_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DSCR, dscr);
+ if (retval != ERROR_OK)
+ return retval;
/* Examine debug reason */
arm_dpm_report_dscr(&armv7a->dpm, cortex_a8->cpudbg_dscr);
retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_WFAR,
&wfar);
+ if (retval != ERROR_OK)
+ return retval;
arm_dpm_report_wfar(&armv7a->dpm, wfar);
}
struct breakpoint *breakpoint = NULL;
struct breakpoint stepbreakpoint;
struct reg *r;
+ int retval;
int timeout = 100;
target->debug_reason = DBG_REASON_SINGLESTEP;
- cortex_a8_resume(target, 1, address, 0, 0);
+ retval = cortex_a8_resume(target, 1, address, 0, 0);
+ if (retval != ERROR_OK)
+ return retval;
while (target->state != TARGET_HALTED)
{
- cortex_a8_poll(target);
+ retval = cortex_a8_poll(target);
+ if (retval != ERROR_OK)
+ return retval;
if (--timeout == 0)
{
- LOG_WARNING("timeout waiting for target halt");
- break;
+ LOG_ERROR("timeout waiting for target halt");
+ return ERROR_FAIL;
}
}
/*
- * Cortex-A8 Breakpoint and watchpoint fuctions
+ * Cortex-A8 Breakpoint and watchpoint functions
*/
/* Setup hardware Breakpoint Register Pair */
struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
#if 0
-/* It is perfectly possible to remove brakpoints while the taget is running */
+/* It is perfectly possible to remove breakpoints while the target is running */
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
/*
- * Cortex-A8 Reset fuctions
+ * Cortex-A8 Reset functions
*/
static int cortex_a8_assert_reset(struct target *target)
jtag_add_reset(0, 0);
retval = cortex_a8_poll(target);
+ if (retval != ERROR_OK)
+ return retval;
if (target->reset_halt) {
if (target->state != TARGET_HALTED) {
* ap number for every access.
*/
+static int cortex_a8_read_phys_memory(struct target *target,
+ uint32_t address, uint32_t size,
+ uint32_t count, uint8_t *buffer)
+{
+ struct armv7a_common *armv7a = target_to_armv7a(target);
+ struct adiv5_dap *swjdp = &armv7a->dap;
+ int retval = ERROR_INVALID_ARGUMENTS;
+
+ /* cortex_a8 handles unaligned memory access */
+
+// ??? dap_ap_select(swjdp, swjdp_memoryap);
+ LOG_DEBUG("Reading memory at real address 0x%x; size %d; count %d", address, size, count);
+ if (count && buffer) {
+ switch (size) {
+ case 4:
+ retval = mem_ap_read_buf_u32(swjdp, buffer, 4 * count, address);
+ break;
+ case 2:
+ retval = mem_ap_read_buf_u16(swjdp, buffer, 2 * count, address);
+ break;
+ case 1:
+ retval = mem_ap_read_buf_u8(swjdp, buffer, count, address);
+ break;
+ }
+ }
+
+ return retval;
+}
+
static int cortex_a8_read_memory(struct target *target, uint32_t address,
uint32_t size, uint32_t count, uint8_t *buffer)
{
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct adiv5_dap *swjdp = &armv7a->dap;
- int retval = ERROR_INVALID_ARGUMENTS;
+ int enabled = 0;
+ uint32_t virt, phys;
+ int retval;
/* cortex_a8 handles unaligned memory access */
// ??? dap_ap_select(swjdp, swjdp_memoryap);
+ LOG_DEBUG("Reading memory at address 0x%x; size %d; count %d", address, size, count);
+ retval = cortex_a8_mmu(target, &enabled);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if(enabled)
+ {
+ virt = address;
+ cortex_a8_virt2phys(target, virt, &phys);
+ LOG_DEBUG("Reading at virtual address. Translating v:0x%x to r:0x%x", virt, phys);
+ address = phys;
+ }
+
+ return cortex_a8_read_phys_memory(target, address, size, count, buffer);
+}
- if (count && buffer) {
- switch (size) {
- case 4:
- retval = mem_ap_read_buf_u32(swjdp, buffer, 4 * count, address);
- break;
- case 2:
- retval = mem_ap_read_buf_u16(swjdp, buffer, 2 * count, address);
- break;
- case 1:
- retval = mem_ap_read_buf_u8(swjdp, buffer, count, address);
- break;
- }
- }
-
- return retval;
+static int cortex_a8_write_phys_memory(struct target *target,
+ uint32_t address, uint32_t size,
+ uint32_t count, uint8_t *buffer)
+{
+ struct armv7a_common *armv7a = target_to_armv7a(target);
+ struct adiv5_dap *swjdp = &armv7a->dap;
+ int retval = ERROR_INVALID_ARGUMENTS;
+
+// ??? dap_ap_select(swjdp, swjdp_memoryap);
+
+ LOG_DEBUG("Writing memory to real address 0x%x; size %d; count %d", address, size, count);
+ if (count && buffer) {
+ switch (size) {
+ case 4:
+ retval = mem_ap_write_buf_u32(swjdp, buffer, 4 * count, address);
+ break;
+ case 2:
+ retval = mem_ap_write_buf_u16(swjdp, buffer, 2 * count, address);
+ break;
+ case 1:
+ retval = mem_ap_write_buf_u8(swjdp, buffer, count, address);
+ break;
+ }
+ }
+
+ /* REVISIT this op is generic ARMv7-A/R stuff */
+ if (retval == ERROR_OK && target->state == TARGET_HALTED)
+ {
+ struct arm_dpm *dpm = armv7a->armv4_5_common.dpm;
+
+ retval = dpm->prepare(dpm);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* The Cache handling will NOT work with MMU active, the
+ * wrong addresses will be invalidated!
+ *
+ * For both ICache and DCache, walk all cache lines in the
+ * address range. Cortex-A8 has fixed 64 byte line length.
+ *
+ * REVISIT per ARMv7, these may trigger watchpoints ...
+ */
+
+ /* invalidate I-Cache */
+ if (armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
+ {
+ /* ICIMVAU - Invalidate Cache single entry
+ * with MVA to PoU
+ * MCR p15, 0, r0, c7, c5, 1
+ */
+ for (uint32_t cacheline = address;
+ cacheline < address + size * count;
+ cacheline += 64) {
+ retval = dpm->instr_write_data_r0(dpm,
+ ARMV4_5_MCR(15, 0, 0, 7, 5, 1),
+ cacheline);
+ }
+ }
+
+ /* invalidate D-Cache */
+ if (armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled)
+ {
+ /* DCIMVAC - Invalidate data Cache line
+ * with MVA to PoC
+ * MCR p15, 0, r0, c7, c6, 1
+ */
+ for (uint32_t cacheline = address;
+ cacheline < address + size * count;
+ cacheline += 64) {
+ retval = dpm->instr_write_data_r0(dpm,
+ ARMV4_5_MCR(15, 0, 0, 7, 6, 1),
+ cacheline);
+ }
+ }
+
+ /* (void) */ dpm->finish(dpm);
+ }
+
+ return retval;
}
static int cortex_a8_write_memory(struct target *target, uint32_t address,
- uint32_t size, uint32_t count, uint8_t *buffer)
+ uint32_t size, uint32_t count, uint8_t *buffer)
{
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct adiv5_dap *swjdp = &armv7a->dap;
- int retval = ERROR_INVALID_ARGUMENTS;
-
-// ??? dap_ap_select(swjdp, swjdp_memoryap);
-
- if (count && buffer) {
- switch (size) {
- case 4:
- retval = mem_ap_write_buf_u32(swjdp, buffer, 4 * count, address);
- break;
- case 2:
- retval = mem_ap_write_buf_u16(swjdp, buffer, 2 * count, address);
- break;
- case 1:
- retval = mem_ap_write_buf_u8(swjdp, buffer, count, address);
- break;
- }
- }
-
- /* REVISIT this op is generic ARMv7-A/R stuff */
- if (retval == ERROR_OK && target->state == TARGET_HALTED)
- {
- struct arm_dpm *dpm = armv7a->armv4_5_common.dpm;
-
- retval = dpm->prepare(dpm);
- if (retval != ERROR_OK)
- return retval;
-
- /* The Cache handling will NOT work with MMU active, the
- * wrong addresses will be invalidated!
- *
- * For both ICache and DCache, walk all cache lines in the
- * address range. Cortex-A8 has fixed 64 byte line length.
- *
- * REVISIT per ARMv7, these may trigger watchpoints ...
- */
-
- /* invalidate I-Cache */
- if (armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
- {
- /* ICIMVAU - Invalidate Cache single entry
- * with MVA to PoU
- * MCR p15, 0, r0, c7, c5, 1
- */
- for (uint32_t cacheline = address;
- cacheline < address + size * count;
- cacheline += 64) {
- retval = dpm->instr_write_data_r0(dpm,
- ARMV4_5_MCR(15, 0, 0, 7, 5, 1),
- cacheline);
- }
- }
-
- /* invalidate D-Cache */
- if (armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled)
- {
- /* DCIMVAC - Invalidate data Cache line
- * with MVA to PoC
- * MCR p15, 0, r0, c7, c6, 1
- */
- for (uint32_t cacheline = address;
- cacheline < address + size * count;
- cacheline += 64) {
- retval = dpm->instr_write_data_r0(dpm,
- ARMV4_5_MCR(15, 0, 0, 7, 6, 1),
- cacheline);
- }
- }
-
- /* (void) */ dpm->finish(dpm);
- }
-
- return retval;
+ int enabled = 0;
+ uint32_t virt, phys;
+ int retval;
+
+// ??? dap_ap_select(swjdp, swjdp_memoryap);
+
+ LOG_DEBUG("Writing memory to address 0x%x; size %d; count %d", address, size, count);
+ retval = cortex_a8_mmu(target, &enabled);
+ if (retval != ERROR_OK)
+ return retval;
+ if(enabled)
+ {
+ virt = address;
+ cortex_a8_virt2phys(target, virt, &phys);
+ LOG_DEBUG("Writing to virtual address. Translating v:0x%x to r:0x%x", virt, phys);
+ address = phys;
+ }
+
+ return cortex_a8_write_phys_memory(target, address, size,
+ count, buffer);
}
static int cortex_a8_bulk_write_memory(struct target *target, uint32_t address,
/* We do one extra read to ensure DAP is configured,
* we call ahbap_debugport_init(swjdp) instead
*/
- ahbap_debugport_init(swjdp);
- mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_CPUID, &cpuid);
+ retval = ahbap_debugport_init(swjdp);
+ 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;
+
if ((retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_CPUID, &cpuid)) != ERROR_OK)
{
LOG_DEBUG("didr = 0x%08" PRIx32, didr);
armv7a->armv4_5_common.core_type = ARM_MODE_MON;
- cortex_a8_dpm_setup(cortex_a8, didr);
+ retval = cortex_a8_dpm_setup(cortex_a8, didr);
+ if (retval != ERROR_OK)
+ return retval;
/* Setup Breakpoint Register Pairs */
cortex_a8->brp_num = ((didr >> 24) & 0x0F) + 1;
cortex_a8->fast_reg_read = 0;
+ /* Set default value */
+ cortex_a8->current_address_mode = ARM_MODE_ANY;
+
/* register arch-specific functions */
armv7a->examine_debug_reason = NULL;
armv7a->pre_restore_context = NULL;
armv7a->armv4_5_mmu.armv4_5_cache.ctype = -1;
-// armv7a->armv4_5_mmu.get_ttb = armv7a_get_ttb;
- armv7a->armv4_5_mmu.read_memory = cortex_a8_read_memory;
- armv7a->armv4_5_mmu.write_memory = cortex_a8_write_memory;
-// armv7a->armv4_5_mmu.disable_mmu_caches = armv7a_disable_mmu_caches;
-// armv7a->armv4_5_mmu.enable_mmu_caches = armv7a_enable_mmu_caches;
+ armv7a->armv4_5_mmu.get_ttb = cortex_a8_get_ttb;
+ armv7a->armv4_5_mmu.read_memory = cortex_a8_read_phys_memory;
+ armv7a->armv4_5_mmu.write_memory = cortex_a8_write_phys_memory;
+ armv7a->armv4_5_mmu.disable_mmu_caches = cortex_a8_disable_mmu_caches;
+ armv7a->armv4_5_mmu.enable_mmu_caches = cortex_a8_enable_mmu_caches;
armv7a->armv4_5_mmu.has_tiny_pages = 1;
armv7a->armv4_5_mmu.mmu_enabled = 0;
return ERROR_OK;
}
+static uint32_t cortex_a8_get_ttb(struct target *target)
+{
+ struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
+ struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
+ uint32_t ttb = 0, retval = ERROR_OK;
+
+ /* current_address_mode is set inside cortex_a8_virt2phys()
+ where we can determine if address belongs to user or kernel */
+ if(cortex_a8->current_address_mode == ARM_MODE_SVC)
+ {
+ /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
+ retval = armv7a->armv4_5_common.mrc(target, 15,
+ 0, 1, /* op1, op2 */
+ 2, 0, /* CRn, CRm */
+ &ttb);
+ }
+ else if(cortex_a8->current_address_mode == ARM_MODE_USR)
+ {
+ /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
+ retval = armv7a->armv4_5_common.mrc(target, 15,
+ 0, 0, /* op1, op2 */
+ 2, 0, /* CRn, CRm */
+ &ttb);
+ }
+ /* we don't know whose address is: user or kernel
+ we assume that if we are in kernel mode then
+ address belongs to kernel else if in user mode
+ - to user */
+ else if(armv7a->armv4_5_common.core_mode == ARM_MODE_SVC)
+ {
+ /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
+ retval = armv7a->armv4_5_common.mrc(target, 15,
+ 0, 1, /* op1, op2 */
+ 2, 0, /* CRn, CRm */
+ &ttb);
+ }
+ else if(armv7a->armv4_5_common.core_mode == ARM_MODE_USR)
+ {
+ /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
+ retval = armv7a->armv4_5_common.mrc(target, 15,
+ 0, 0, /* op1, op2 */
+ 2, 0, /* CRn, CRm */
+ &ttb);
+ }
+ /* finally we don't know whose ttb to use: user or kernel */
+ else
+ LOG_ERROR("Don't know how to get ttb for current mode!!!");
+
+ ttb &= 0xffffc000;
+
+ return ttb;
+}
+
+static void cortex_a8_disable_mmu_caches(struct target *target, int mmu,
+ int d_u_cache, int i_cache)
+{
+ struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
+ struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
+ uint32_t cp15_control;
+
+ /* read cp15 control register */
+ armv7a->armv4_5_common.mrc(target, 15,
+ 0, 0, /* op1, op2 */
+ 1, 0, /* CRn, CRm */
+ &cp15_control);
+
+
+ if (mmu)
+ cp15_control &= ~0x1U;
+
+ if (d_u_cache)
+ cp15_control &= ~0x4U;
+
+ if (i_cache)
+ cp15_control &= ~0x1000U;
+
+ armv7a->armv4_5_common.mcr(target, 15,
+ 0, 0, /* op1, op2 */
+ 1, 0, /* CRn, CRm */
+ cp15_control);
+}
+
+static void cortex_a8_enable_mmu_caches(struct target *target, int mmu,
+ int d_u_cache, int i_cache)
+{
+ struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
+ struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
+ uint32_t cp15_control;
+
+ /* read cp15 control register */
+ armv7a->armv4_5_common.mrc(target, 15,
+ 0, 0, /* op1, op2 */
+ 1, 0, /* CRn, CRm */
+ &cp15_control);
+
+ if (mmu)
+ cp15_control |= 0x1U;
+
+ if (d_u_cache)
+ cp15_control |= 0x4U;
+
+ if (i_cache)
+ cp15_control |= 0x1000U;
+
+ armv7a->armv4_5_common.mcr(target, 15,
+ 0, 0, /* op1, op2 */
+ 1, 0, /* CRn, CRm */
+ cp15_control);
+}
+
+
+static int cortex_a8_mmu(struct target *target, int *enabled)
+{
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("%s: target not halted", __func__);
+ return ERROR_TARGET_INVALID;
+ }
+
+ *enabled = target_to_cortex_a8(target)->armv7a_common.armv4_5_mmu.mmu_enabled;
+ return ERROR_OK;
+}
+
+static int cortex_a8_virt2phys(struct target *target,
+ uint32_t virt, uint32_t *phys)
+{
+ uint32_t cb;
+ struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
+ // struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
+ struct armv7a_common *armv7a = target_to_armv7a(target);
+
+ /* We assume that virtual address is separated
+ between user and kernel in Linux style:
+ 0x00000000-0xbfffffff - User space
+ 0xc0000000-0xffffffff - Kernel space */
+ if( virt < 0xc0000000 ) /* Linux user space */
+ cortex_a8->current_address_mode = ARM_MODE_USR;
+ else /* Linux kernel */
+ cortex_a8->current_address_mode = ARM_MODE_SVC;
+ uint32_t ret;
+ int retval = armv4_5_mmu_translate_va(target,
+ &armv7a->armv4_5_mmu, virt, &cb, &ret);
+ if (retval != ERROR_OK)
+ return retval;
+ /* Reset the flag. We don't want someone else to use it by error */
+ cortex_a8->current_address_mode = ARM_MODE_ANY;
+
+ *phys = ret;
+ return ERROR_OK;
+}
+
COMMAND_HANDLER(cortex_a8_handle_cache_info_command)
{
struct target *target = get_current_target(CMD_CTX);
COMMAND_HANDLER(cortex_a8_handle_dbginit_command)
{
struct target *target = get_current_target(CMD_CTX);
+ if (!target_was_examined(target))
+ {
+ LOG_ERROR("target not examined yet");
+ return ERROR_FAIL;
+ }
- cortex_a8_init_debug_access(target);
-
- return ERROR_OK;
+ return cortex_a8_init_debug_access(target);
}
static const struct command_registration cortex_a8_exec_command_handlers[] = {
.target_create = cortex_a8_target_create,
.init_target = cortex_a8_init_target,
.examine = cortex_a8_examine,
+
+ .read_phys_memory = cortex_a8_read_phys_memory,
+ .write_phys_memory = cortex_a8_write_phys_memory,
+ .mmu = cortex_a8_mmu,
+ .virt2phys = cortex_a8_virt2phys,
+
};
Code Review / openocd.git / blobdiff