[U-Boot] [RFC][PATCH 11/36] x86 - Make cpu init functions weak

[Graeme Russ]

---
 arch/i386/cpu/cpu.c                 |   14 ++++++++++++--
 arch/i386/cpu/sc520/sc520.c         |    9 ++-------
 arch/i386/include/asm/u-boot-i386.h |    2 ++
 board/eNET/eNET.c                   |   22 ----------------------
 4 files changed, 16 insertions(+), 31 deletions(-)

diff --git a/arch/i386/cpu/cpu.c b/arch/i386/cpu/cpu.c
index e96380a..06b27c8 100644
--- a/arch/i386/cpu/cpu.c
+++ b/arch/i386/cpu/cpu.c
@@ -87,7 +87,7 @@ static void reload_gdt(void)
 }


-int cpu_init_f(void)
+int x86_cpu_init_f(void)
 {
 	const u32 em_rst = ~X86_CR0_EM;
 	const u32 mp_ne_set = X86_CR0_MP | X86_CR0_NE;
@@ -102,15 +102,25 @@ int cpu_init_f(void)

 	return 0;
 }
+int cpu_init_f(void) __attribute__((weak, alias("x86_cpu_init_f")));

-int cpu_init_r(void)
+int x86_cpu_init_r(void)
 {
+	const u32 nw_cd_rst = ~(X86_CR0_NW | X86_CR0_CD);
+
+	/* turn on the cache and disable write through */
+	asm("movl	%%cr0, %%eax\n"
+	    "andl	%0, %%eax\n"
+	    "movl	%%eax, %%cr0\n"
+	    "wbinvd\n" : : "i" (nw_cd_rst): "eax");
+
 	reload_gdt();

 	/* Initialize core interrupt and exception functionality of CPU */
 	cpu_init_interrupts ();
 	return 0;
 }
+int cpu_init_r(void) __attribute__((weak, alias("x86_cpu_init_r")));

 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
diff --git a/arch/i386/cpu/sc520/sc520.c b/arch/i386/cpu/sc520/sc520.c
index 056df56..8e8986b 100644
--- a/arch/i386/cpu/sc520/sc520.c
+++ b/arch/i386/cpu/sc520/sc520.c
@@ -40,10 +40,8 @@ DECLARE_GLOBAL_DATA_PTR;

 volatile sc520_mmcr_t *sc520_mmcr = (sc520_mmcr_t *)0xfffef000;

-void init_sc520(void)
+int cpu_init_f(void)
 {
-	const u32 nw_cd_rst = ~(X86_CR0_NW | X86_CR0_CD);
-
 	/*
 	 * Set the UARTxCTL register at it's slower,
 	 * baud clock giving us a 1.8432 MHz reference
@@ -85,10 +83,7 @@ void init_sc520(void)
 	/* turn on the SDRAM write buffer */
 	writeb(0x11, &sc520_mmcr->dbctl);

-	/* turn on the cache and disable write through */
-	asm("movl	%%cr0, %%eax\n"
-	    "andl	%0, %%eax\n"
-	    "movl	%%eax, %%cr0\n"  : : "i" (nw_cd_rst): "eax");
+	return x86_cpu_init_f();
 }

 unsigned long init_sc520_dram(void)
diff --git a/arch/i386/include/asm/u-boot-i386.h b/arch/i386/include/asm/u-boot-i386.h
index ce097a3..80db52f 100644
--- a/arch/i386/include/asm/u-boot-i386.h
+++ b/arch/i386/include/asm/u-boot-i386.h
@@ -25,7 +25,9 @@
 #define _U_BOOT_I386_H_	1

 /* cpu/.../cpu.c */
+int x86_cpu_init_r(void);
 int cpu_init_r(void);
+int x86_cpu_init_f(void);
 int cpu_init_f(void);

 /* cpu/.../timer.c */
diff --git a/board/eNET/eNET.c b/board/eNET/eNET.c
index 7f0e257..30d8750 100644
--- a/board/eNET/eNET.c
+++ b/board/eNET/eNET.c
@@ -48,33 +48,11 @@ unsigned long monitor_flash_len = CONFIG_SYS_MONITOR_LEN;
 static void enet_timer_isr(void);
 static void enet_toggle_run_led(void);

-void init_sc520_enet (void)
-{
-	/* Set CPU Speed to 100MHz */
-	writeb(0x01, &sc520_mmcr->cpuctl);
-
-	/* wait at least one millisecond */
-	asm("movl	$0x2000,%%ecx\n"
-	    "0:	pushl %%ecx\n"
-	    "popl	%%ecx\n"
-	    "loop 0b\n": : : "ecx");
-
-	/* turn on the SDRAM write buffer */
-	writeb(0x11, &sc520_mmcr->dbctl);
-
-	/* turn on the cache and disable write through */
-	asm("movl	%%cr0, %%eax\n"
-	    "andl	$0x9fffffff, %%eax\n"
-	    "movl	%%eax, %%cr0\n"  : : : "eax");
-}
-
 /*
  * Miscellaneous platform dependent initializations
  */
 int board_early_init_f(void)
 {
-	init_sc520_enet();
-
 	writeb(0x01, &sc520_mmcr->gpcsrt);		/* GP Chip Select Recovery Time */
 	writeb(0x07, &sc520_mmcr->gpcspw);		/* GP Chip Select Pulse Width */
 	writeb(0x00, &sc520_mmcr->gpcsoff);		/* GP Chip Select Offset */
--
1.7.1.422.g049e9