x86: Add UV bios call infrastructure v4
Add the EFI callback function and associated wrapper code.
Initialize SAL system table entry info at boot time.
Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Paul Jackson <pj@sgi.com>
Acked-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/efi.h b/include/asm-x86/efi.h
index ed2de22..313438e 100644
--- a/include/asm-x86/efi.h
+++ b/include/asm-x86/efi.h
@@ -94,4 +94,17 @@
extern void efi_call_phys_prelog(void);
extern void efi_call_phys_epilog(void);
+#ifndef CONFIG_EFI
+/*
+ * IF EFI is not configured, have the EFI calls return -ENOSYS.
+ */
+#define efi_call0(_f) (-ENOSYS)
+#define efi_call1(_f, _a1) (-ENOSYS)
+#define efi_call2(_f, _a1, _a2) (-ENOSYS)
+#define efi_call3(_f, _a1, _a2, _a3) (-ENOSYS)
+#define efi_call4(_f, _a1, _a2, _a3, _a4) (-ENOSYS)
+#define efi_call5(_f, _a1, _a2, _a3, _a4, _a5) (-ENOSYS)
+#define efi_call6(_f, _a1, _a2, _a3, _a4, _a5, _a6) (-ENOSYS)
+#endif /* CONFIG_EFI */
+
#endif /* ASM_X86__EFI_H */
diff --git a/include/asm-x86/uv/bios.h b/include/asm-x86/uv/bios.h
index 7cd6d7e..f63e46e 100644
--- a/include/asm-x86/uv/bios.h
+++ b/include/asm-x86/uv/bios.h
@@ -2,9 +2,7 @@
#define ASM_X86__UV__BIOS_H
/*
- * BIOS layer definitions.
- *
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
+ * UV BIOS layer definitions.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -19,11 +17,43 @@
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) Russ Anderson
*/
#include <linux/rtc.h>
-#define BIOS_FREQ_BASE 0x01000001
+/*
+ * Values for the BIOS calls. It is passed as the first * argument in the
+ * BIOS call. Passing any other value in the first argument will result
+ * in a BIOS_STATUS_UNIMPLEMENTED return status.
+ */
+enum uv_bios_cmd {
+ UV_BIOS_COMMON,
+ UV_BIOS_GET_SN_INFO,
+ UV_BIOS_FREQ_BASE
+};
+
+/*
+ * Status values returned from a BIOS call.
+ */
+enum {
+ BIOS_STATUS_SUCCESS = 0,
+ BIOS_STATUS_UNIMPLEMENTED = -ENOSYS,
+ BIOS_STATUS_EINVAL = -EINVAL,
+ BIOS_STATUS_UNAVAIL = -EBUSY
+};
+
+/*
+ * The UV system table describes specific firmware
+ * capabilities available to the Linux kernel at runtime.
+ */
+struct uv_systab {
+ char signature[4]; /* must be "UVST" */
+ u32 revision; /* distinguish different firmware revs */
+ u64 function; /* BIOS runtime callback function ptr */
+};
enum {
BIOS_FREQ_BASE_PLATFORM = 0,
@@ -31,38 +61,17 @@
BIOS_FREQ_BASE_REALTIME_CLOCK = 2
};
-# define BIOS_CALL(result, a0, a1, a2, a3, a4, a5, a6, a7) \
- do { \
- /* XXX - the real call goes here */ \
- result.status = BIOS_STATUS_UNIMPLEMENTED; \
- isrv.v0 = 0; \
- isrv.v1 = 0; \
- } while (0)
+/*
+ * bios calls have 6 parameters
+ */
+extern s64 uv_bios_call(enum uv_bios_cmd, u64, u64, u64, u64, u64);
+extern s64 uv_bios_call_irqsave(enum uv_bios_cmd, u64, u64, u64, u64, u64);
+extern s64 uv_bios_call_reentrant(enum uv_bios_cmd, u64, u64, u64, u64, u64);
-enum {
- BIOS_STATUS_SUCCESS = 0,
- BIOS_STATUS_UNIMPLEMENTED = -1,
- BIOS_STATUS_EINVAL = -2,
- BIOS_STATUS_ERROR = -3
-};
-
-struct uv_bios_retval {
- /*
- * A zero status value indicates call completed without error.
- * A negative status value indicates reason of call failure.
- * A positive status value indicates success but an
- * informational value should be printed (e.g., "reboot for
- * change to take effect").
- */
- s64 status;
- u64 v0;
- u64 v1;
- u64 v2;
-};
+extern void uv_bios_init(void);
extern long
x86_bios_freq_base(unsigned long which, unsigned long *ticks_per_second,
unsigned long *drift_info);
-extern const char *x86_bios_strerror(long status);
#endif /* ASM_X86__UV__BIOS_H */