From f3ed1cfad748bf5610d315afba7ec04d6338bd9b Mon Sep 17 00:00:00 2001
From: Eric Biederman <ebiederm@xmission.com>
Date: Sat, 16 Oct 2004 08:38:58 +0000
Subject: - HDAMA boots! - Set the bootstrap processor flag in the mptable. -
 Implement 64bit support in our print statements - Fix the reporting of how
 many cpus we are waiting to stop.   It is the 1 less than the actual number
 of cpus running. - Actually enable cpu_initialization. - Fix
 firstsiblingdevice in config.g - Add IORESOURCE_FIXED to all of the resources
 set by config.g - Fix the apic_cluster rule to add an apic_cluster path not
 an apic path. - Add a div64.h to assist in the 64bit printf.

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1682 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
---
 src/arch/i386/include/div64.h | 48 +++++++++++++++++++++++++++++++++++++++++++
 src/arch/i386/smp/mpspec.c    |  2 +-
 2 files changed, 49 insertions(+), 1 deletion(-)
 create mode 100644 src/arch/i386/include/div64.h

(limited to 'src/arch')

diff --git a/src/arch/i386/include/div64.h b/src/arch/i386/include/div64.h
new file mode 100644
index 0000000000..28ed8b296a
--- /dev/null
+++ b/src/arch/i386/include/div64.h
@@ -0,0 +1,48 @@
+#ifndef __I386_DIV64
+#define __I386_DIV64
+
+/*
+ * do_div() is NOT a C function. It wants to return
+ * two values (the quotient and the remainder), but
+ * since that doesn't work very well in C, what it
+ * does is:
+ *
+ * - modifies the 64-bit dividend _in_place_
+ * - returns the 32-bit remainder
+ *
+ * This ends up being the most efficient "calling
+ * convention" on x86.
+ */
+#define do_div(n,base) ({ \
+	unsigned long __upper, __low, __high, __mod, __base; \
+	__base = (base); \
+	asm("":"=a" (__low), "=d" (__high):"A" (n)); \
+	__upper = __high; \
+	if (__high) { \
+		__upper = __high % (__base); \
+		__high = __high / (__base); \
+	} \
+	asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (__base), "0" (__low), "1" (__upper)); \
+	asm("":"=A" (n):"a" (__low),"d" (__high)); \
+	__mod; \
+})
+
+/*
+ * (long)X = ((long long)divs) / (long)div
+ * (long)rem = ((long long)divs) % (long)div
+ *
+ * Warning, this will do an exception if X overflows.
+ */
+#define div_long_long_rem(a,b,c) div_ll_X_l_rem(a,b,c)
+
+extern inline long
+div_ll_X_l_rem(long long divs, long div, long *rem)
+{
+	long dum2;
+      __asm__("divl %2":"=a"(dum2), "=d"(*rem)
+      :	"rm"(div), "A"(divs));
+
+	return dum2;
+
+}
+#endif
diff --git a/src/arch/i386/smp/mpspec.c b/src/arch/i386/smp/mpspec.c
index c674cf58f5..daeb78435d 100644
--- a/src/arch/i386/smp/mpspec.c
+++ b/src/arch/i386/smp/mpspec.c
@@ -121,7 +121,7 @@ void smp_write_processors(struct mp_config_table *mc)
 		}
 		cpu_flag = MPC_CPU_ENABLED;
 		if (boot_apic_id == cpu->path.u.apic.apic_id) {
-			cpu_flag = MPC_CPU_ENABLED;
+			cpu_flag = MPC_CPU_ENABLED | MPC_CPU_BOOTPROCESSOR;
 		}
 		smp_write_processor(mc, 
 			cpu->path.u.apic.apic_id, apic_version,
-- 
cgit v1.2.3