@@ -157,3 +157,62 @@ void register_reset(RegisterInfo *reg)
register_write_val(reg, reg->access->reset);
}
+
+void register_write_memory(void *opaque, hwaddr addr,
+ uint64_t value, unsigned size)
+{
+ RegisterInfoArray *reg_array = opaque;
+ RegisterInfo *reg = NULL;
+ uint64_t we;
+ int i;
+
+ for (i = 0; i < reg_array->num_elements; i++) {
+ if (reg_array->r[i]->access->addr == addr) {
+ reg = reg_array->r[i];
+ break;
+ }
+ }
+
+ if (!reg) {
+ qemu_log_mask(LOG_GUEST_ERROR, "Write to unimplemented register at " \
+ "address: %#" PRIx64 "\n", addr);
+ return;
+ }
+
+ /* Generate appropriate write enable mask */
+ if (reg->data_size < size) {
+ we = MAKE_64BIT_MASK(0, reg->data_size * 8);
+ } else {
+ we = MAKE_64BIT_MASK(0, size * 8);
+ }
+
+ register_write(reg, value, we, reg_array->prefix,
+ reg_array->debug);
+}
+
+uint64_t register_read_memory(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ RegisterInfoArray *reg_array = opaque;
+ RegisterInfo *reg = NULL;
+ uint64_t read_val;
+ int i;
+
+ for (i = 0; i < reg_array->num_elements; i++) {
+ if (reg_array->r[i]->access->addr == addr) {
+ reg = reg_array->r[i];
+ break;
+ }
+ }
+
+ if (!reg) {
+ qemu_log_mask(LOG_GUEST_ERROR, "Read to unimplemented register at " \
+ "address: %#" PRIx64 "\n", addr);
+ return 0;
+ }
+
+ read_val = register_read(reg, size * 8, reg_array->prefix,
+ reg_array->debug);
+
+ return extract64(read_val, 0, size * 8);
+}
@@ -15,6 +15,7 @@
typedef struct RegisterInfo RegisterInfo;
typedef struct RegisterAccessInfo RegisterAccessInfo;
+typedef struct RegisterInfoArray RegisterInfoArray;
/**
* Access description for a register that is part of guest accessible device
@@ -51,6 +52,8 @@ struct RegisterAccessInfo {
void (*post_write)(RegisterInfo *reg, uint64_t val);
uint64_t (*post_read)(RegisterInfo *reg, uint64_t val);
+
+ hwaddr addr;
};
/**
@@ -79,6 +82,25 @@ struct RegisterInfo {
};
/**
+ * This structure is used to group all of the individual registers which are
+ * modeled using the RegisterInfo structure.
+ *
+ * @r is an aray containing of all the relevent RegisterInfo structures.
+ *
+ * @num_elements is the number of elements in the array r
+ *
+ * @mem: optional Memory region for the register
+ */
+
+struct RegisterInfoArray {
+ int num_elements;
+ RegisterInfo **r;
+
+ bool debug;
+ const char *prefix;
+};
+
+/**
* write a value to a register, subject to its restrictions
* @reg: register to write to
* @val: value to write
@@ -109,4 +131,25 @@ uint64_t register_read(RegisterInfo *reg, uint64_t re, const char* prefix,
void register_reset(RegisterInfo *reg);
+/**
+ * Memory API MMIO write handler that will write to a Register API register.
+ * @opaque: RegisterInfo to write to
+ * @addr: Address to write
+ * @value: Value to write
+ * @size: Number of bytes to write
+ */
+
+void register_write_memory(void *opaque, hwaddr addr, uint64_t value,
+ unsigned size);
+
+/**
+ * Memory API MMIO read handler that will read from a Register API register.
+ * @opaque: RegisterInfo to read from
+ * @addr: Address to read
+ * @size: Number of bytes to read
+ * returns: Value read from register
+ */
+
+uint64_t register_read_memory(void *opaque, hwaddr addr, unsigned size);
+
#endif