[v10,03/28] exec: add debug version of physical memory read and write API

Commit Message

Brijesh Singh Feb. 28, 2018, 9:10 p.m. UTC

Adds the following new APIs
- cpu_physical_memory_read_debug
- cpu_physical_memory_write_debug
- cpu_physical_memory_rw_debug
- ldl_phys_debug
- ldq_phys_debug

Cc: Paolo Bonzini <[e-mail]>
Cc: Peter Crosthwaite <[e-mail]>
Cc: Richard Henderson <[e-mail]>
Signed-off-by: Brijesh Singh <[e-mail]>
Reviewed-by: Paolo Bonzini <[e-mail]>
---
 exec.c                    | 40 ++++++++++++++++++++++++++++++++++++++++
 include/exec/cpu-common.h | 15 +++++++++++++++
 2 files changed, 55 insertions(+)

Patch

diff --git a/exec.c b/exec.c
index 4408cd26c989..633be92d2b3a 100644
--- a/exec.c
+++ b/exec.c
@@ -3596,6 +3596,46 @@  void address_space_cache_destroy(MemoryRegionCache *cache)
 #define RCU_READ_UNLOCK()        rcu_read_unlock()
 #include "memory_ldst.inc.c"
 
+uint32_t ldl_phys_debug(CPUState *cpu, hwaddr addr)
+{
+    MemTxAttrs attrs;
+    int asidx = cpu_asidx_from_attrs(cpu, attrs);
+    uint32_t val;
+
+    /* set debug attrs to indicate memory access is from the debugger */
+    attrs.debug = 1;
+
+    address_space_rw(cpu->cpu_ases[asidx].as, addr, attrs,
+                     (void *) &val, 4, 0);
+
+    return tswap32(val);
+}
+
+uint64_t ldq_phys_debug(CPUState *cpu, hwaddr addr)
+{
+    MemTxAttrs attrs;
+    int asidx = cpu_asidx_from_attrs(cpu, attrs);
+    uint64_t val;
+
+    /* set debug attrs to indicate memory access is from the debugger */
+    attrs.debug = 1;
+
+    address_space_rw(cpu->cpu_ases[asidx].as, addr, attrs,
+                     (void *) &val, 8, 0);
+    return val;
+}
+
+void cpu_physical_memory_rw_debug(hwaddr addr, uint8_t *buf,
+                                  int len, int is_write)
+{
+    MemTxAttrs attrs;
+
+    /* set debug attrs to indicate memory access is from the debugger */
+    attrs.debug = 1;
+
+    address_space_rw(&address_space_memory, addr, attrs, buf, len, is_write);
+}
+
 /* virtual memory access for debug (includes writing to ROM) */
 int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
                         uint8_t *buf, int len, int is_write)
diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h
index 74341b19d26a..fa01385d4f1b 100644
--- a/include/exec/cpu-common.h
+++ b/include/exec/cpu-common.h
@@ -77,11 +77,26 @@  size_t qemu_ram_pagesize_largest(void);
 
 void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf,
                             int len, int is_write);
+void cpu_physical_memory_rw_debug(hwaddr addr, uint8_t *buf,
+                                  int len, int is_write);
 static inline void cpu_physical_memory_read(hwaddr addr,
                                             void *buf, int len)
 {
     cpu_physical_memory_rw(addr, buf, len, 0);
 }
+static inline void cpu_physical_memory_read_debug(hwaddr addr,
+                                                  void *buf, int len)
+{
+    cpu_physical_memory_rw_debug(addr, buf, len, 0);
+}
+static inline void cpu_physical_memory_write_debug(hwaddr addr,
+                                                   const void *buf, int len)
+{
+    cpu_physical_memory_rw_debug(addr, (void *)buf, len, 1);
+}
+uint32_t ldl_phys_debug(CPUState *cpu, hwaddr addr);
+uint64_t ldq_phys_debug(CPUState *cpu, hwaddr addr);
+
 static inline void cpu_physical_memory_write(hwaddr addr,
                                              const void *buf, int len)
 {