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Message-ID: <20081021212031.GB4037@sgi.com>
Date: Tue, 21 Oct 2008 16:20:31 -0500
From: Dimitri Sivanich <sivanich@....com>
To: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
linux-kernel@...r.kernel.org
Cc: Dimitri Sivanich <sivanich@....com>
Subject: [PATCH 2/3] SGI RTC: add bios framework for RTC timer operations
This patch provides a bios call framework for implementing SGI RTC timer
functions.
Signed-off-by: Dimitri Sivanich <sivanich@....com>
Index: linux/arch/x86/kernel/bios_uv.c
===================================================================
--- linux.orig/arch/x86/kernel/bios_uv.c 2008-10-21 12:09:46.000000000 -0500
+++ linux/arch/x86/kernel/bios_uv.c 2008-10-21 12:10:46.000000000 -0500
@@ -160,6 +160,66 @@ s64 uv_bios_freq_base(u64 clock_type, u6
}
EXPORT_SYMBOL_GPL(uv_bios_freq_base);
+int uv_bios_rtct(enum uv_bios_rtct_cmd which, void *a1, void *a2, void *a3,
+ void *a4, void *a5)
+{
+ int rc = 0;
+
+ switch (which) {
+ case UV_RTC_MASK:
+ rc = uv_bios_call(UV_BIOS_RTC_MASK, (u64)a1, 0, 0, 0, 0);
+ break;
+ case UV_RTC_READ:
+ rc = uv_bios_call(UV_BIOS_RTC_READ, (u64)a1, 0, 0, 0, 0);
+ break;
+ case UV_RTC_EVT_INIT:
+ rc = uv_bios_call(UV_BIOS_RTC_EVT_INIT, (u64)a1, (u64)a2,
+ (u64)a3, (u64)a4, (u64)a5);
+ break;
+ case UV_RTC_EVT_SET:
+ {
+ u64 apicid = per_cpu(x86_cpu_to_apicid, *(int *)a1);
+ rc = uv_bios_call(UV_BIOS_RTC_EVT_SET, apicid, (u64)a2, 0, 0,
+ 0);
+ }
+ break;
+ case UV_RTC_EVT_UNSET:
+ {
+ u64 apicid = per_cpu(x86_cpu_to_apicid, *(int *)a1);
+ rc = uv_bios_call(UV_BIOS_RTC_EVT_UNSET, apicid, 0, 0, 0, 0);
+ }
+ break;
+ case UV_RTC_EVT_ACK:
+ {
+ u64 apicid = per_cpu(x86_cpu_to_apicid, *(int *)a1);
+ rc = uv_bios_call(UV_BIOS_RTC_EVT_ACK, apicid, 0, 0, 0, 0);
+ }
+ break;
+ case UV_RTC_EVT_START:
+ {
+ u64 apicid = per_cpu(x86_cpu_to_apicid, *(int *)a1);
+ rc = uv_bios_call(UV_BIOS_RTC_EVT_START, apicid, 0, 0, 0, 0);
+ }
+ break;
+ case UV_RTC_EVT_STOP:
+ {
+ u64 apicid = per_cpu(x86_cpu_to_apicid, *(int *)a1);
+ rc = uv_bios_call(UV_BIOS_RTC_EVT_STOP, apicid, 0, 0, 0, 0);
+ }
+ break;
+ case UV_RTC_EVT_RESUME:
+ {
+ u64 apicid = per_cpu(x86_cpu_to_apicid, *(int *)a1);
+ rc = uv_bios_call(UV_BIOS_RTC_EVT_RESUME, apicid, 0, 0, 0, 0);
+ }
+ break;
+ default:
+ rc = -1;
+ }
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(uv_bios_rtct);
#ifdef CONFIG_EFI
void uv_bios_init(void)
Index: linux/include/asm-x86/uv/bios.h
===================================================================
--- linux.orig/include/asm-x86/uv/bios.h 2008-10-21 12:09:46.000000000 -0500
+++ linux/include/asm-x86/uv/bios.h 2008-10-21 12:10:46.000000000 -0500
@@ -36,7 +36,16 @@ enum uv_bios_cmd {
UV_BIOS_WATCHLIST_ALLOC,
UV_BIOS_WATCHLIST_FREE,
UV_BIOS_MEMPROTECT,
- UV_BIOS_GET_PARTITION_ADDR
+ UV_BIOS_GET_PARTITION_ADDR,
+ UV_BIOS_RTC_MASK,
+ UV_BIOS_RTC_READ,
+ UV_BIOS_RTC_EVT_INIT,
+ UV_BIOS_RTC_EVT_SET,
+ UV_BIOS_RTC_EVT_UNSET,
+ UV_BIOS_RTC_EVT_ACK,
+ UV_BIOS_RTC_EVT_START,
+ UV_BIOS_RTC_EVT_STOP,
+ UV_BIOS_RTC_EVT_RESUME
};
/*
@@ -66,6 +75,22 @@ enum {
BIOS_FREQ_BASE_REALTIME_CLOCK = 2
};
+/*
+ * Values for the BIOS rtct calls. It is passed as the first argument
+ * in the uv_bios_rtct call.
+ */
+enum uv_bios_rtct_cmd {
+ UV_RTC_MASK,
+ UV_RTC_READ,
+ UV_RTC_EVT_INIT,
+ UV_RTC_EVT_SET,
+ UV_RTC_EVT_UNSET,
+ UV_RTC_EVT_ACK,
+ UV_RTC_EVT_START,
+ UV_RTC_EVT_STOP,
+ UV_RTC_EVT_RESUME
+};
+
union partition_info_u {
u64 val;
struct {
@@ -106,6 +131,9 @@ extern int uv_bios_mq_watchlist_free(int
extern s64 uv_bios_change_memprotect(u64, u64, enum uv_memprotect);
extern s64 uv_bios_reserved_page_pa(u64, u64 *, u64 *, u64 *);
+extern int uv_bios_rtct(enum uv_bios_rtct_cmd, void *, void *, void *,
+ void *, void *);
+
extern void uv_bios_init(void);
extern unsigned long sn_rtc_cycles_per_second;
--
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