From e2b4e2abff4088efa93dec4f508822be894f81ef Mon Sep 17 00:00:00 2001
From: nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Wed, 1 Jun 2005 21:13:56 +0000
Subject: [PATCH] add even more workarounds for bcm4710, remove
-fno-delayed-branch from kernel cflags -- not needed anymore
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@1132 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
target/linux/linux-2.4/Makefile | 4 +-
.../brcm/003-bcm47xx_workarounds.patch | 14 +++
.../patches/brcm/004-bcm94710_mmu.patch | 117 ++++++++++++++++--
3 files changed, 122 insertions(+), 13 deletions(-)
diff --git a/target/linux/linux-2.4/Makefile b/target/linux/linux-2.4/Makefile
index af06b1154..08e91da6d 100644
--- a/target/linux/linux-2.4/Makefile
+++ b/target/linux/linux-2.4/Makefile
@@ -187,7 +187,7 @@ $(LINUX_DIR)/.depend_done: $(LINUX_DIR)/.configured
touch $(LINUX_DIR)/.depend_done
$(LINUX_DIR)/$(LINUX_BINLOC): $(LINUX_DIR)/.depend_done
- $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) PATH=$(TARGET_PATH) CFLAGS_KERNEL="-fno-delayed-branch " $(LINUX_FORMAT)
+ $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) PATH=$(TARGET_PATH) $(LINUX_FORMAT)
$(LINUX_KERNEL): $(LINUX_DIR)/$(LINUX_BINLOC)
cp -fa $< $@
@@ -198,7 +198,7 @@ $(LINUX_IMAGE): $(LINUX_KERNEL)
$(LINUX_DIR)/.modules_done: $(LINUX_KERNEL) $(LINUX_IMAGE)
rm -rf $(LINUX_BUILD_DIR)/modules
- $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) PATH=$(TARGET_PATH) CFLAGS_KERNEL="-fno-delayed-branch " modules
+ $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) PATH=$(TARGET_PATH) modules
$(MAKE) -C $(LINUX_DIR) DEPMOD=true INSTALL_MOD_PATH=$(LINUX_BUILD_DIR)/modules modules_install
touch $(LINUX_DIR)/.modules_done
diff --git a/target/linux/linux-2.4/patches/brcm/003-bcm47xx_workarounds.patch b/target/linux/linux-2.4/patches/brcm/003-bcm47xx_workarounds.patch
index 6e52e9c72..73afd60c1 100644
--- a/target/linux/linux-2.4/patches/brcm/003-bcm47xx_workarounds.patch
+++ b/target/linux/linux-2.4/patches/brcm/003-bcm47xx_workarounds.patch
@@ -106,3 +106,17 @@ diff -urN linux.old/arch/mips/mm/tlbex-r4k.S linux.dev/arch/mips/mm/tlbex-r4k.S
GET_PGD(k0, k1) # get pgd pointer
mfc0 k0, CP0_BADVADDR # Get faulting address
srl k0, k0, _PGDIR_SHIFT # get pgd only bits
+diff -urN linux.old/arch/mips/kernel/entry.S linux.dev/arch/mips/kernel/entry.S
+--- linux.old/arch/mips/kernel/entry.S 2003-08-25 13:44:40.000000000 +0200
++++ linux.dev/arch/mips/kernel/entry.S 2005-06-01 20:10:36.000000000 +0200
+@@ -100,6 +100,10 @@
+ * and R4400 SC and MC versions.
+ */
+ NESTED(except_vec3_generic, 0, sp)
++#ifdef CONFIG_BCM4710
++ nop
++ nop
++#endif
+ #if R5432_CP0_INTERRUPT_WAR
+ mfc0 k0, CP0_INDEX
+ #endif
diff --git a/target/linux/linux-2.4/patches/brcm/004-bcm94710_mmu.patch b/target/linux/linux-2.4/patches/brcm/004-bcm94710_mmu.patch
index 9fd0162ed..c12c08aa7 100644
--- a/target/linux/linux-2.4/patches/brcm/004-bcm94710_mmu.patch
+++ b/target/linux/linux-2.4/patches/brcm/004-bcm94710_mmu.patch
@@ -1,6 +1,6 @@
diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
---- linux.old/arch/mips/mm/c-r4k.c 2005-05-28 17:42:06.000000000 +0200
-+++ linux.dev/arch/mips/mm/c-r4k.c 2005-05-29 18:26:34.000000000 +0200
+--- linux.old/arch/mips/mm/c-r4k.c 2005-06-01 18:42:44.000000000 +0200
++++ linux.dev/arch/mips/mm/c-r4k.c 2005-06-01 18:49:07.000000000 +0200
@@ -14,6 +14,12 @@
#include <linux/mm.h>
#include <linux/bitops.h>
@@ -26,7 +26,29 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
while (1) {
/* Hit_Writeback_Inv_D */
protected_writeback_dcache_line(addr);
-@@ -509,6 +520,10 @@
+@@ -405,6 +416,10 @@
+ else {
+ addr = start & ~(ic_lsize - 1);
+ aend = (end - 1) & ~(ic_lsize - 1);
++#ifdef CONFIG_BCM4710
++ BCM4710_FILL_TLB(addr);
++ BCM4710_FILL_TLB(aend);
++#endif
+ while (1) {
+ /* Hit_Invalidate_I */
+ protected_flush_icache_line(addr);
+@@ -487,6 +502,10 @@
+
+ a = addr & ~(sc_lsize - 1);
+ end = (addr + size - 1) & ~(sc_lsize - 1);
++#ifdef CONFIG_BCM4710
++ BCM4710_FILL_TLB(a);
++ BCM4710_FILL_TLB(end);
++#endif
+ while (1) {
+ flush_scache_line(a); /* Hit_Writeback_Inv_SD */
+ if (a == end)
+@@ -509,6 +528,10 @@
R4600_HIT_CACHEOP_WAR_IMPL;
a = addr & ~(dc_lsize - 1);
end = (addr + size - 1) & ~(dc_lsize - 1);
@@ -37,7 +59,18 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
while (1) {
flush_dcache_line(a); /* Hit_Writeback_Inv_D */
if (a == end)
-@@ -576,6 +591,10 @@
+@@ -537,6 +560,10 @@
+
+ a = addr & ~(sc_lsize - 1);
+ end = (addr + size - 1) & ~(sc_lsize - 1);
++#ifdef CONFIG_BCM4710
++ BCM4710_FILL_TLB(a);
++ BCM4710_FILL_TLB(end);
++#endif
+ while (1) {
+ flush_scache_line(a); /* Hit_Writeback_Inv_SD */
+ if (a == end)
+@@ -576,6 +603,10 @@
unsigned long ic_lsize = current_cpu_data.icache.linesz;
unsigned long dc_lsize = current_cpu_data.dcache.linesz;
@@ -49,8 +82,8 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
protected_flush_icache_line(addr & ~(ic_lsize - 1));
diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kcache.h
---- linux.old/include/asm-mips/r4kcache.h 2005-05-28 17:42:06.000000000 +0200
-+++ linux.dev/include/asm-mips/r4kcache.h 2005-05-29 18:34:46.000000000 +0200
+--- linux.old/include/asm-mips/r4kcache.h 2005-06-01 18:42:43.000000000 +0200
++++ linux.dev/include/asm-mips/r4kcache.h 2005-06-01 19:07:11.000000000 +0200
@@ -15,6 +15,25 @@
#include <asm/asm.h>
#include <asm/cacheops.h>
@@ -86,7 +119,17 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
static inline void flush_icache_line_indexed(unsigned long addr)
{
-@@ -47,6 +68,10 @@
+@@ -32,6 +53,9 @@
+
+ static inline void flush_dcache_line_indexed(unsigned long addr)
+ {
++#ifdef CONFIG_BCM4710
++ BCM4710_DUMMY_RREG();
++#endif
+ cache_op(Index_Writeback_Inv_D, addr);
+ }
+
+@@ -47,6 +71,10 @@
static inline void flush_dcache_line(unsigned long addr)
{
@@ -97,7 +140,55 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
cache_op(Hit_Writeback_Inv_D, addr);
}
-@@ -196,7 +221,13 @@
+@@ -91,6 +119,9 @@
+ */
+ static inline void protected_writeback_dcache_line(unsigned long addr)
+ {
++#ifdef CONFIG_BCM4710
++ BCM4710_DUMMY_RREG();
++#endif
+ __asm__ __volatile__(
+ ".set noreorder\n\t"
+ ".set mips3\n"
+@@ -148,8 +179,12 @@
+ unsigned long ws, addr;
+
+ for (ws = 0; ws < ws_end; ws += ws_inc)
+- for (addr = start; addr < end; addr += 0x200)
++ for (addr = start; addr < end; addr += 0x200) {
++#ifdef CONFIG_BCM4710
++ BCM4710_DUMMY_RREG();
++#endif
+ cache16_unroll32(addr|ws,Index_Writeback_Inv_D);
++ }
+ }
+
+ static inline void blast_dcache16_page(unsigned long page)
+@@ -158,6 +193,9 @@
+ unsigned long end = start + PAGE_SIZE;
+
+ do {
++#ifdef CONFIG_BCM4710
++ BCM4710_DUMMY_RREG();
++#endif
+ cache16_unroll32(start,Hit_Writeback_Inv_D);
+ start += 0x200;
+ } while (start < end);
+@@ -173,8 +211,12 @@
+ unsigned long ws, addr;
+
+ for (ws = 0; ws < ws_end; ws += ws_inc)
+- for (addr = start; addr < end; addr += 0x200)
++ for (addr = start; addr < end; addr += 0x200) {
++#ifdef CONFIG_BCM4710
++ BCM4710_DUMMY_RREG();
++#endif
+ cache16_unroll32(addr|ws,Index_Writeback_Inv_D);
++ }
+ }
+
+ static inline void blast_icache16(void)
+@@ -196,7 +238,13 @@
unsigned long start = page;
unsigned long end = start + PAGE_SIZE;
@@ -111,7 +202,7 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
cache16_unroll32(start,Hit_Invalidate_I);
start += 0x200;
} while (start < end);
-@@ -291,8 +322,12 @@
+@@ -291,8 +339,12 @@
unsigned long ws, addr;
for (ws = 0; ws < ws_end; ws += ws_inc)
@@ -125,7 +216,7 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
}
static inline void blast_dcache32_page(unsigned long page)
-@@ -300,6 +335,9 @@
+@@ -300,7 +352,13 @@
unsigned long start = page;
unsigned long end = start + PAGE_SIZE;
@@ -133,9 +224,13 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
+ __asm__ __volatile__("nop;nop;nop;nop");
+#endif
do {
++#ifdef CONFIG_BCM4710
++ BCM4710_DUMMY_RREG();
++#endif
cache32_unroll32(start,Hit_Writeback_Inv_D);
start += 0x400;
-@@ -339,6 +377,9 @@
+ } while (start < end);
+@@ -339,6 +397,9 @@
unsigned long start = page;
unsigned long end = start + PAGE_SIZE;
--
2.20.1