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>
This commit is contained in:
Russ Anderson
Ingo Molnar
parent
a50f70b175
commit
7f5942329e
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@ -1,8 +1,6 @@
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/*
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* BIOS run time interface routines.
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*
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* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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@ -16,33 +14,94 @@
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
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* Copyright (c) Russ Anderson
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*/
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#include <linux/efi.h>
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#include <asm/efi.h>
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#include <linux/io.h>
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#include <asm/uv/bios.h>
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const char *
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x86_bios_strerror(long status)
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struct uv_systab uv_systab;
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s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
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{
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const char *str;
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switch (status) {
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case 0: str = "Call completed without error"; break;
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case -1: str = "Not implemented"; break;
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case -2: str = "Invalid argument"; break;
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case -3: str = "Call completed with error"; break;
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default: str = "Unknown BIOS status code"; break;
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}
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return str;
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struct uv_systab *tab = &uv_systab;
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if (!tab->function)
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/*
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* BIOS does not support UV systab
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*/
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return BIOS_STATUS_UNIMPLEMENTED;
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return efi_call6((void *)__va(tab->function),
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(u64)which, a1, a2, a3, a4, a5);
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}
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s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
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u64 a4, u64 a5)
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{
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unsigned long bios_flags;
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s64 ret;
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local_irq_save(bios_flags);
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ret = uv_bios_call(which, a1, a2, a3, a4, a5);
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local_irq_restore(bios_flags);
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return ret;
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}
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s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
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u64 a4, u64 a5)
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{
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s64 ret;
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preempt_disable();
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ret = uv_bios_call(which, a1, a2, a3, a4, a5);
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preempt_enable();
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return ret;
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}
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long
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x86_bios_freq_base(unsigned long which, unsigned long *ticks_per_second,
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unsigned long *drift_info)
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x86_bios_freq_base(unsigned long clock_type, unsigned long *ticks_per_second,
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unsigned long *drift_info)
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{
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struct uv_bios_retval isrv;
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BIOS_CALL(isrv, BIOS_FREQ_BASE, which, 0, 0, 0, 0, 0, 0);
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*ticks_per_second = isrv.v0;
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*drift_info = isrv.v1;
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return isrv.status;
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return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
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(u64)ticks_per_second, 0, 0, 0);
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}
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EXPORT_SYMBOL_GPL(x86_bios_freq_base);
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#ifdef CONFIG_EFI
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void uv_bios_init(void)
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{
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struct uv_systab *tab;
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if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
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(efi.uv_systab == (unsigned long)NULL)) {
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printk(KERN_CRIT "No EFI UV System Table.\n");
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uv_systab.function = (unsigned long)NULL;
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return;
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}
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tab = (struct uv_systab *)ioremap(efi.uv_systab,
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sizeof(struct uv_systab));
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if (strncmp(tab->signature, "UVST", 4) != 0)
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printk(KERN_ERR "bad signature in UV system table!");
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/*
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* Copy table to permanent spot for later use.
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*/
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memcpy(&uv_systab, tab, sizeof(struct uv_systab));
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iounmap(tab);
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printk(KERN_INFO "EFI UV System Table Revision %d\n", tab->revision);
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}
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#else /* !CONFIG_EFI */
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void uv_bios_init(void) { }
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#endif
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@ -427,6 +427,7 @@ void __init uv_system_init(void)
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gnode_upper = (((unsigned long)node_id.s.node_id) &
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~((1 << n_val) - 1)) << m_val;
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uv_bios_init();
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uv_rtc_init();
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for_each_present_cpu(cpu) {
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@ -94,4 +94,17 @@ extern void efi_reserve_early(void);
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extern void efi_call_phys_prelog(void);
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extern void efi_call_phys_epilog(void);
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#ifndef CONFIG_EFI
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/*
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* IF EFI is not configured, have the EFI calls return -ENOSYS.
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*/
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#define efi_call0(_f) (-ENOSYS)
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#define efi_call1(_f, _a1) (-ENOSYS)
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#define efi_call2(_f, _a1, _a2) (-ENOSYS)
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#define efi_call3(_f, _a1, _a2, _a3) (-ENOSYS)
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#define efi_call4(_f, _a1, _a2, _a3, _a4) (-ENOSYS)
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#define efi_call5(_f, _a1, _a2, _a3, _a4, _a5) (-ENOSYS)
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#define efi_call6(_f, _a1, _a2, _a3, _a4, _a5, _a6) (-ENOSYS)
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#endif /* CONFIG_EFI */
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#endif /* ASM_X86__EFI_H */
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@ -2,9 +2,7 @@
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#define ASM_X86__UV__BIOS_H
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/*
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* BIOS layer definitions.
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*
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* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
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* UV BIOS layer definitions.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -19,11 +17,43 @@
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
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* Copyright (c) Russ Anderson
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*/
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#include <linux/rtc.h>
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#define BIOS_FREQ_BASE 0x01000001
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/*
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* Values for the BIOS calls. It is passed as the first * argument in the
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* BIOS call. Passing any other value in the first argument will result
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* in a BIOS_STATUS_UNIMPLEMENTED return status.
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*/
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enum uv_bios_cmd {
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UV_BIOS_COMMON,
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UV_BIOS_GET_SN_INFO,
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UV_BIOS_FREQ_BASE
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};
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/*
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* Status values returned from a BIOS call.
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*/
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enum {
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BIOS_STATUS_SUCCESS = 0,
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BIOS_STATUS_UNIMPLEMENTED = -ENOSYS,
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BIOS_STATUS_EINVAL = -EINVAL,
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BIOS_STATUS_UNAVAIL = -EBUSY
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};
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/*
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* The UV system table describes specific firmware
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* capabilities available to the Linux kernel at runtime.
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*/
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struct uv_systab {
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char signature[4]; /* must be "UVST" */
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u32 revision; /* distinguish different firmware revs */
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u64 function; /* BIOS runtime callback function ptr */
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};
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enum {
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BIOS_FREQ_BASE_PLATFORM = 0,
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@ -31,38 +61,17 @@ enum {
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BIOS_FREQ_BASE_REALTIME_CLOCK = 2
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};
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# define BIOS_CALL(result, a0, a1, a2, a3, a4, a5, a6, a7) \
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do { \
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/* XXX - the real call goes here */ \
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result.status = BIOS_STATUS_UNIMPLEMENTED; \
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isrv.v0 = 0; \
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isrv.v1 = 0; \
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} while (0)
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/*
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* bios calls have 6 parameters
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*/
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extern s64 uv_bios_call(enum uv_bios_cmd, u64, u64, u64, u64, u64);
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extern s64 uv_bios_call_irqsave(enum uv_bios_cmd, u64, u64, u64, u64, u64);
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extern s64 uv_bios_call_reentrant(enum uv_bios_cmd, u64, u64, u64, u64, u64);
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enum {
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BIOS_STATUS_SUCCESS = 0,
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BIOS_STATUS_UNIMPLEMENTED = -1,
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BIOS_STATUS_EINVAL = -2,
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BIOS_STATUS_ERROR = -3
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};
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struct uv_bios_retval {
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/*
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* A zero status value indicates call completed without error.
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* A negative status value indicates reason of call failure.
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* A positive status value indicates success but an
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* informational value should be printed (e.g., "reboot for
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* change to take effect").
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*/
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s64 status;
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u64 v0;
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u64 v1;
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u64 v2;
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};
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extern void uv_bios_init(void);
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extern long
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x86_bios_freq_base(unsigned long which, unsigned long *ticks_per_second,
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unsigned long *drift_info);
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extern const char *x86_bios_strerror(long status);
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#endif /* ASM_X86__UV__BIOS_H */
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