ARM920: implement basic MMU ops

mmu() works; virt2phys() fails and logs an error.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

diff --git a/src/target/arm920t.c b/src/target/arm920t.c
index dd9fae33ded381eed4eca46e9bb1b26d6decf3d8..e043aee024c69b4937d8737e4a2e2892b5958817 100644 (file)
--- a/src/target/arm920t.c
+++ b/src/target/arm920t.c
@@ -460,6 +460,25 @@ int arm920t_arch_state(struct target_s *target)
        return ERROR_OK;
 }
 
+static int arm920_mmu(struct target_s *target, int *enabled)
+{
+       if (target->state != TARGET_HALTED) {
+               LOG_ERROR("%s: target not halted", __func__);
+               return ERROR_TARGET_INVALID;
+       }
+
+       *enabled = target_to_arm920(target)->armv4_5_mmu.mmu_enabled;
+       return ERROR_OK;
+}
+
+static int arm920_virt2phys(struct target_s *target,
+               uint32_t virt, uint32_t *phys)
+{
+       /** @todo Implement this!  */
+       LOG_ERROR("%s: not implemented", __func__);
+       return ERROR_FAIL;
+}
+
 /** Reads a buffer, in the specified word size, with current MMU settings. */
 int arm920t_read_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
 {
@@ -1389,6 +1408,9 @@ target_type_t arm920t_target =
        .write_memory = arm920t_write_memory,
        .read_phys_memory = arm920t_read_phys_memory,
        .write_phys_memory = arm920t_write_phys_memory,
+       .mmu = arm920_mmu,
+       .virt2phys = arm920_virt2phys,
+
        .bulk_write_memory = arm7_9_bulk_write_memory,
        .checksum_memory = arm7_9_checksum_memory,
        .blank_check_memory = arm7_9_blank_check_memory,