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-rw-r--r--target/linux/brcm47xx/patches-2.6.31/130-remove_scache.patch89
1 files changed, 89 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-2.6.31/130-remove_scache.patch b/target/linux/brcm47xx/patches-2.6.31/130-remove_scache.patch
new file mode 100644
index 000000000..46aaaca0e
--- /dev/null
+++ b/target/linux/brcm47xx/patches-2.6.31/130-remove_scache.patch
@@ -0,0 +1,89 @@
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -215,7 +215,6 @@ config MIPS_MALTA
+ select I8259
+ select MIPS_BOARDS_GEN
+ select MIPS_BONITO64
+- select MIPS_CPU_SCACHE
+ select PCI_GT64XXX_PCI0
+ select MIPS_MSC
+ select SWAP_IO_SPACE
+@@ -1518,13 +1517,6 @@ config IP22_CPU_SCACHE
+ bool
+ select BOARD_SCACHE
+
+-#
+-# Support for a MIPS32 / MIPS64 style S-caches
+-#
+-config MIPS_CPU_SCACHE
+- bool
+- select BOARD_SCACHE
+-
+ config R5000_CPU_SCACHE
+ bool
+ select BOARD_SCACHE
+--- a/arch/mips/kernel/cpu-probe.c
++++ b/arch/mips/kernel/cpu-probe.c
+@@ -754,6 +754,8 @@ static inline void cpu_probe_mips(struct
+ case PRID_IMP_25KF:
+ c->cputype = CPU_25KF;
+ __cpu_name[cpu] = "MIPS 25Kc";
++ /* Probe for L2 cache */
++ c->scache.flags &= ~MIPS_CACHE_NOT_PRESENT;
+ break;
+ case PRID_IMP_34K:
+ c->cputype = CPU_34K;
+--- a/arch/mips/mm/Makefile
++++ b/arch/mips/mm/Makefile
+@@ -33,6 +33,5 @@ obj-$(CONFIG_CPU_CAVIUM_OCTEON) += c-oct
+ obj-$(CONFIG_IP22_CPU_SCACHE) += sc-ip22.o
+ obj-$(CONFIG_R5000_CPU_SCACHE) += sc-r5k.o
+ obj-$(CONFIG_RM7000_CPU_SCACHE) += sc-rm7k.o
+-obj-$(CONFIG_MIPS_CPU_SCACHE) += sc-mips.o
+
+ EXTRA_CFLAGS += -Werror
+--- a/arch/mips/mm/c-r4k.c
++++ b/arch/mips/mm/c-r4k.c
+@@ -1148,7 +1148,6 @@ static void __init loongson2_sc_init(voi
+
+ extern int r5k_sc_init(void);
+ extern int rm7k_sc_init(void);
+-extern int mips_sc_init(void);
+
+ static void __cpuinit setup_scache(void)
+ {
+@@ -1202,29 +1201,17 @@ static void __cpuinit setup_scache(void)
+ #endif
+
+ default:
+- if (c->isa_level == MIPS_CPU_ISA_M32R1 ||
+- c->isa_level == MIPS_CPU_ISA_M32R2 ||
+- c->isa_level == MIPS_CPU_ISA_M64R1 ||
+- c->isa_level == MIPS_CPU_ISA_M64R2) {
+-#ifdef CONFIG_MIPS_CPU_SCACHE
+- if (mips_sc_init ()) {
+- scache_size = c->scache.ways * c->scache.sets * c->scache.linesz;
+- printk("MIPS secondary cache %ldkB, %s, linesize %d bytes.\n",
+- scache_size >> 10,
+- way_string[c->scache.ways], c->scache.linesz);
+- }
+-#else
+- if (!(c->scache.flags & MIPS_CACHE_NOT_PRESENT))
+- panic("Dunno how to handle MIPS32 / MIPS64 second level cache");
+-#endif
+- return;
+- }
+ sc_present = 0;
+ }
+
+ if (!sc_present)
+ return;
+
++ if ((c->isa_level == MIPS_CPU_ISA_M32R1 ||
++ c->isa_level == MIPS_CPU_ISA_M64R1) &&
++ !(c->scache.flags & MIPS_CACHE_NOT_PRESENT))
++ panic("Dunno how to handle MIPS32 / MIPS64 second level cache");
++
+ /* compute a couple of other cache variables */
+ c->scache.waysize = scache_size / c->scache.ways;
+