x86: Add UV bios call infrastructure v4

[linux-2.6-omap-h63xx.git] / include / asm-x86 / uv / bios.h

diff --git a/include/asm-x86/uv/bios.h b/include/asm-x86/uv/bios.h
index 7cd6d7ec1308fe523811d462865951a8667d7ab0..f63e46e5337c868f21ba70bf7603a72ac44b7545 100644 (file)
--- 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
@@ -19,50 +17,61 @@
  *  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_FREQ_BASE_PLATFORM = 0,
-       BIOS_FREQ_BASE_INTERVAL_TIMER = 1,
-       BIOS_FREQ_BASE_REALTIME_CLOCK = 2
+       BIOS_STATUS_SUCCESS             =  0,
+       BIOS_STATUS_UNIMPLEMENTED       = -ENOSYS,
+       BIOS_STATUS_EINVAL              = -EINVAL,
+       BIOS_STATUS_UNAVAIL             = -EBUSY
 };
 
-# 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)
+/*
+ * 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_STATUS_SUCCESS             =  0,
-       BIOS_STATUS_UNIMPLEMENTED       = -1,
-       BIOS_STATUS_EINVAL              = -2,
-       BIOS_STATUS_ERROR               = -3
+       BIOS_FREQ_BASE_PLATFORM = 0,
+       BIOS_FREQ_BASE_INTERVAL_TIMER = 1,
+       BIOS_FREQ_BASE_REALTIME_CLOCK = 2
 };
 
-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;
-};
+/*
+ * 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);
+
+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 */