feat(fake_host): Add support for per PE sysreg emulation
This patch adds support to emulate per PE sysreg access to the host_util
library on the fake_host platform. This allows to emulate different CPUs
by calling host_util_cpuid() with the desired CPU to emulate.
Signed-off-by: Javier Almansa Sobrino <javier.almansasobrino@arm.com>
Change-Id: I97c7f299ff78a9cf5dc78f353d7526a0209cdc6b
diff --git a/plat/host/common/include/host_utils.h b/plat/host/common/include/host_utils.h
index 77a3b5e..645ea3b 100644
--- a/plat/host/common/include/host_utils.h
+++ b/plat/host/common/include/host_utils.h
@@ -42,18 +42,35 @@
typedef void (*wr_cb_t)(u_register_t val, u_register_t *reg);
/*
- * Structure to hold the callback pointers and value of the emulated sysreg.
+ * Structure to hold the callback pointers for register access emulation.
*/
struct sysreg_cb {
- char sysreg[MAX_SYSREG_NAME_LEN + 1U];
rd_cb_t rd_cb;
wr_cb_t wr_cb;
- u_register_t value;
+ /*
+ * Pointer to the instance of the register corresponding to the
+ * current CPU
+ */
+ u_register_t *reg;
+};
+
+/*
+ * Structure to hold register access emulation data.
+ */
+struct sysreg_data {
+ char name[MAX_SYSREG_NAME_LEN + 1U];
+ struct sysreg_cb callbacks;
+ u_register_t value[MAX_CPUS];
};
/*
* Return the callbacks for a given sysreg or NULL
* if no callbacks are found.
+ *
+ * Arguments:
+ * name - String containing the name of the sysreg. The name cannot exceed
+ * MAX_SYSREG_NAME_LEN (excluding the terminatig NULL character)
+ * or it will be truncated.
*/
struct sysreg_cb *host_util_get_sysreg_cb(char *name);
@@ -64,10 +81,10 @@
* read or write operations. This allows to control what to return on
* a read or how to process a write.
*
- * Argsuments:
+ * Arguments:
* name - String containing the name of the sysreg. The name of
* the sysreg cannot exceed MAX_SYSREG_NAME_LEN (excluding
- * the terminating null character) or it will be truncated.
+ * the terminating NULL character) or it will be truncated.
* rd_cb - Callback to be invoked on a read operation.
* wr_cb - Callback to be invoked on a write operation.
* init - Value used as reset value for the sysreg.
@@ -87,7 +104,7 @@
* Arguments:
* name - String containing the name of the sysreg. The name of
* the sysreg cannot exceed MAX_SYSREG_NAME_LEN (excluding
- * the terminating null character) or it will be truncated.
+ * the terminating NULL character) or it will be truncated.
* init - Value used as reset value for the sysreg.
*
* Returns:
@@ -105,4 +122,9 @@
*/
unsigned long host_util_get_granule_base(void);
+/*
+ * Set the current CPU emulated by the platform.
+ */
+void host_util_set_cpuid(unsigned int cpuid);
+
#endif /* HOST_UTILS_H */