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powerpc/powernv: Enable reading and updating of system parameters

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This patch enables reading and updating of system parameters through
OPAL call.

Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Neelesh Gupta
2014-03-07 11:02:09 +05:30
committed by Benjamin Herrenschmidt
parent 8d72482322
commit 4029cd6654
5 changed files with 310 additions and 2 deletions
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arch/powerpc/include/asm/opal.h
+15 -1
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@@ -167,8 +167,10 @@ extern int opal_enter_rtas(struct rtas_args *args,
#define OPAL_DUMP_ACK 84
#define OPAL_GET_MSG 85
#define OPAL_CHECK_ASYNC_COMPLETION 86
#define OPAL_DUMP_RESEND 91
#define OPAL_SYNC_HOST_REBOOT 87
#define OPAL_GET_PARAM 89
#define OPAL_SET_PARAM 90
#define OPAL_DUMP_RESEND 91
#define OPAL_DUMP_INFO2 94
#ifndef __ASSEMBLY__
@@ -410,6 +412,13 @@ enum OpalLPCAddressType {
OPAL_LPC_FW = 2,
};
/* System parameter permission */
enum OpalSysparamPerm {
OPAL_SYSPARAM_READ = 0x1,
OPAL_SYSPARAM_WRITE = 0x2,
OPAL_SYSPARAM_RW = (OPAL_SYSPARAM_READ | OPAL_SYSPARAM_WRITE),
};
struct opal_msg {
uint32_t msg_type;
uint32_t reserved;
@@ -859,6 +868,10 @@ int64_t opal_dump_resend_notification(void);
int64_t opal_get_msg(uint64_t buffer, size_t size);
int64_t opal_check_completion(uint64_t buffer, size_t size, uint64_t token);
int64_t opal_sync_host_reboot(void);
int64_t opal_get_param(uint64_t token, uint32_t param_id, uint64_t buffer,
size_t length);
int64_t opal_set_param(uint64_t token, uint32_t param_id, uint64_t buffer,
size_t length);
/* Internal functions */
extern int early_init_dt_scan_opal(unsigned long node, const char *uname, int depth, void *data);
@@ -900,6 +913,7 @@ extern void opal_nvram_init(void);
extern void opal_flash_init(void);
extern int opal_elog_init(void);
extern void opal_platform_dump_init(void);
extern void opal_sys_param_init(void);
extern int opal_machine_check(struct pt_regs *regs);
extern bool opal_mce_check_early_recovery(struct pt_regs *regs);