From: Ben Gras <ben@minix3.org>
Date: Wed, 28 Apr 2010 13:25:29 +0000 (+0000)
Subject: kernel: fpu init to separate function; also move fpu init down
X-Git-Tag: v3.1.7~105
X-Git-Url: http://zhaoyanbai.com/repos/host.html?a=commitdiff_plain;h=c37401f23ff9b2200b4ed8a5905f03ae5ffdd6de;p=minix.git

kernel: fpu init to separate function; also move fpu init down

moving the fpu code causes exceptions raised by it to be trapped
neatly instead of causing a triple fault, before the IDT is initialized.
---

diff --git a/kernel/arch/i386/arch_system.c b/kernel/arch/i386/arch_system.c
index 486785d4f..67e19f058 100644
--- a/kernel/arch/i386/arch_system.c
+++ b/kernel/arch/i386/arch_system.c
@@ -136,7 +136,7 @@ PRIVATE void tss_init(struct tss_s * tss, void * kernel_stack,
 	*((reg_t *)(tss->sp0 + 1 * sizeof(reg_t))) = cpu;
 }
 
-PUBLIC void arch_init(void)
+PRIVATE void fpu_init(void)
 {
 	unsigned short cw, sw;
 
@@ -184,7 +184,10 @@ PUBLIC void arch_init(void)
                 osfxsr_feature = 0;
                 return;
         }
+}
 
+PUBLIC void arch_init(void)
+{
 #ifdef CONFIG_APIC
 	/*
 	 * this is setting kernel segments to cover most of the phys memory. The
@@ -208,6 +211,7 @@ PUBLIC void arch_init(void)
 	}
 #endif
 
+	fpu_init();
 }
 
 #define COM1_BASE       0x3F8