diff options
Diffstat (limited to 'target/linux/lantiq/patches/0021-MIPS-lantiq-adds-cache-split.patch')
| -rw-r--r-- | target/linux/lantiq/patches/0021-MIPS-lantiq-adds-cache-split.patch | 345 |
1 files changed, 0 insertions, 345 deletions
diff --git a/target/linux/lantiq/patches/0021-MIPS-lantiq-adds-cache-split.patch b/target/linux/lantiq/patches/0021-MIPS-lantiq-adds-cache-split.patch deleted file mode 100644 index 640d1e2ac..000000000 --- a/target/linux/lantiq/patches/0021-MIPS-lantiq-adds-cache-split.patch +++ /dev/null @@ -1,345 +0,0 @@ -From 0f85e79f6f01f50cb703866a555085a9c65bad2f Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Thu, 29 Sep 2011 20:31:54 +0200 -Subject: [PATCH 21/24] MIPS: lantiq: adds cache split - ---- - arch/mips/Kconfig | 22 ++++++ - arch/mips/kernel/vpe.c | 66 ++++++++++++++++++ - arch/mips/mm/c-r4k.c | 172 ++++++++++++++++++++++++++++++++++++++++++++++++ - 3 files changed, 260 insertions(+), 0 deletions(-) - ---- a/arch/mips/Kconfig -+++ b/arch/mips/Kconfig -@@ -1922,6 +1922,28 @@ config IFX_VPE_EXT - help - IFX included extensions in APRP - -+config IFX_VPE_CACHE_SPLIT -+ bool "IFX Cache Split Ways" -+ depends on IFX_VPE_EXT -+ help -+ IFX extension for reserving (splitting) cache ways among VPEs. You must -+ give kernel command line arguments vpe_icache_shared=0 or -+ vpe_dcache_shared=0 to enable splitting of icache or dcache -+ respectively. Then you can specify which cache ways should be -+ assigned to which VPE. There are total 8 cache ways, 4 each -+ for dcache and icache: dcache_way0, dcache_way1,dcache_way2, -+ dcache_way3 and icache_way0,icache_way1, icache_way2,icache_way3. -+ -+ For example, if you specify vpe_icache_shared=0 and icache_way2=1, -+ then the 3rd icache way will be assigned to VPE0 and denied in VPE1. -+ -+ For icache, software is required to make at least one cache way available -+ for a VPE at all times i.e., one can't assign all the icache ways to one -+ VPE. -+ -+ By default, vpe_dcache_shared and vpe_icache_shared are set to 1 -+ (i.e., both icache and dcache are shared among VPEs) -+ - config PERFCTRS - bool "34K Performance counters" - depends on MIPS_MT && PROC_FS ---- a/arch/mips/kernel/vpe.c -+++ b/arch/mips/kernel/vpe.c -@@ -128,6 +128,13 @@ __setup("vpe1_wdog_timeout=", wdog_timeo - EXPORT_SYMBOL(vpe1_wdog_timeout); - - #endif -+ -+#ifdef CONFIG_IFX_VPE_CACHE_SPLIT /* Code for splitting the cache ways among VPEs. */ -+extern int vpe_icache_shared,vpe_dcache_shared; -+extern int icache_way0,icache_way1,icache_way2,icache_way3; -+extern int dcache_way0,dcache_way1,dcache_way2,dcache_way3; -+#endif -+ - /* grab the likely amount of memory we will need. */ - #ifdef CONFIG_MIPS_VPE_LOADER_TOM - #define P_SIZE (2 * 1024 * 1024) -@@ -866,6 +873,65 @@ static int vpe_run(struct vpe * v) - /* enable this VPE */ - write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA); - -+#ifdef CONFIG_IFX_VPE_CACHE_SPLIT -+ if ( (!vpe_icache_shared) || (!vpe_dcache_shared) ) { -+ -+ /* PCP bit must be 1 to split the cache */ -+ if(read_c0_mvpconf0() & MVPCONF0_PCP) { -+ -+ if ( !vpe_icache_shared ){ -+ write_vpe_c0_vpeconf0((read_vpe_c0_vpeconf0()) & ~VPECONF0_ICS); -+ -+ /* -+ * If any cache way is 1, then that way is denied -+ * in VPE1. Otherwise assign that way to VPE1. -+ */ -+ if (!icache_way0) -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() | VPEOPT_IWX0 ); -+ else -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() & ~VPEOPT_IWX0 ); -+ if (!icache_way1) -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() | VPEOPT_IWX1 ); -+ else -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() & ~VPEOPT_IWX1 ); -+ if (!icache_way2) -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() | VPEOPT_IWX2 ); -+ else -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() & ~VPEOPT_IWX2 ); -+ if (!icache_way3) -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() | VPEOPT_IWX3 ); -+ else -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() & ~VPEOPT_IWX3 ); -+ } -+ -+ if ( !vpe_dcache_shared ) { -+ write_vpe_c0_vpeconf0((read_vpe_c0_vpeconf0()) & ~VPECONF0_DCS); -+ -+ /* -+ * If any cache way is 1, then that way is denied -+ * in VPE1. Otherwise assign that way to VPE1. -+ */ -+ if (!dcache_way0) -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() | VPEOPT_DWX0 ); -+ else -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() & ~VPEOPT_DWX0 ); -+ if (!dcache_way1) -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() | VPEOPT_DWX1 ); -+ else -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() & ~VPEOPT_DWX1 ); -+ if (!dcache_way2) -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() | VPEOPT_DWX2 ); -+ else -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() & ~VPEOPT_DWX2 ); -+ if (!dcache_way3) -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() | VPEOPT_DWX3 ); -+ else -+ write_vpe_c0_vpeopt(read_vpe_c0_vpeopt() & ~VPEOPT_DWX3 ); -+ } -+ } -+ } -+#endif /* endif CONFIG_IFX_VPE_CACHE_SPLIT */ -+ - /* clear out any left overs from a previous program */ - write_vpe_c0_status(0); - write_vpe_c0_cause(0); ---- a/arch/mips/mm/c-r4k.c -+++ b/arch/mips/mm/c-r4k.c -@@ -1350,6 +1350,106 @@ static int __init setcoherentio(char *st - __setup("coherentio", setcoherentio); - #endif - -+#ifdef CONFIG_IFX_VPE_CACHE_SPLIT /* Code for splitting the cache ways among VPEs. */ -+ -+#include <asm/mipsmtregs.h> -+ -+/* -+ * By default, vpe_icache_shared and vpe_dcache_shared -+ * values are 1 i.e., both icache and dcache are shared -+ * among the VPEs. -+ */ -+ -+int vpe_icache_shared = 1; -+static int __init vpe_icache_shared_val(char *str) -+{ -+ get_option(&str, &vpe_icache_shared); -+ return 1; -+} -+__setup("vpe_icache_shared=", vpe_icache_shared_val); -+EXPORT_SYMBOL(vpe_icache_shared); -+ -+int vpe_dcache_shared = 1; -+static int __init vpe_dcache_shared_val(char *str) -+{ -+ get_option(&str, &vpe_dcache_shared); -+ return 1; -+} -+__setup("vpe_dcache_shared=", vpe_dcache_shared_val); -+EXPORT_SYMBOL(vpe_dcache_shared); -+ -+/* -+ * Software is required to make atleast one icache -+ * way available for a VPE at all times i.e., one -+ * can't assign all the icache ways to one VPE. -+ */ -+ -+int icache_way0 = 0; -+static int __init icache_way0_val(char *str) -+{ -+ get_option(&str, &icache_way0); -+ return 1; -+} -+__setup("icache_way0=", icache_way0_val); -+ -+int icache_way1 = 0; -+static int __init icache_way1_val(char *str) -+{ -+ get_option(&str, &icache_way1); -+ return 1; -+} -+__setup("icache_way1=", icache_way1_val); -+ -+int icache_way2 = 0; -+static int __init icache_way2_val(char *str) -+{ -+ get_option(&str, &icache_way2); -+ return 1; -+} -+__setup("icache_way2=", icache_way2_val); -+ -+int icache_way3 = 0; -+static int __init icache_way3_val(char *str) -+{ -+ get_option(&str, &icache_way3); -+ return 1; -+} -+__setup("icache_way3=", icache_way3_val); -+ -+int dcache_way0 = 0; -+static int __init dcache_way0_val(char *str) -+{ -+ get_option(&str, &dcache_way0); -+ return 1; -+} -+__setup("dcache_way0=", dcache_way0_val); -+ -+int dcache_way1 = 0; -+static int __init dcache_way1_val(char *str) -+{ -+ get_option(&str, &dcache_way1); -+ return 1; -+} -+__setup("dcache_way1=", dcache_way1_val); -+ -+int dcache_way2 = 0; -+static int __init dcache_way2_val(char *str) -+{ -+ get_option(&str, &dcache_way2); -+ return 1; -+} -+__setup("dcache_way2=", dcache_way2_val); -+ -+int dcache_way3 = 0; -+static int __init dcache_way3_val(char *str) -+{ -+ get_option(&str, &dcache_way3); -+ return 1; -+} -+__setup("dcache_way3=", dcache_way3_val); -+ -+#endif /* endif CONFIG_IFX_VPE_CACHE_SPLIT */ -+ - void __cpuinit r4k_cache_init(void) - { - extern void build_clear_page(void); -@@ -1369,6 +1469,78 @@ void __cpuinit r4k_cache_init(void) - break; - } - -+#ifdef CONFIG_IFX_VPE_CACHE_SPLIT -+ /* -+ * We split the cache ways appropriately among the VPEs -+ * based on cache ways values we received as command line -+ * arguments -+ */ -+ if ( (!vpe_icache_shared) || (!vpe_dcache_shared) ){ -+ -+ /* PCP bit must be 1 to split the cache */ -+ if(read_c0_mvpconf0() & MVPCONF0_PCP) { -+ -+ /* Set CPA bit which enables us to modify VPEOpt register */ -+ write_c0_mvpcontrol((read_c0_mvpcontrol()) | MVPCONTROL_CPA); -+ -+ if ( !vpe_icache_shared ){ -+ write_c0_vpeconf0((read_c0_vpeconf0()) & ~VPECONF0_ICS); -+ /* -+ * If any cache way is 1, then that way is denied -+ * in VPE0. Otherwise assign that way to VPE0. -+ */ -+ printk(KERN_DEBUG "icache is split\n"); -+ printk(KERN_DEBUG "icache_way0=%d icache_way1=%d icache_way2=%d icache_way3=%d\n", -+ icache_way0, icache_way1,icache_way2, icache_way3); -+ if (icache_way0) -+ write_c0_vpeopt(read_c0_vpeopt() | VPEOPT_IWX0 ); -+ else -+ write_c0_vpeopt(read_c0_vpeopt() & ~VPEOPT_IWX0 ); -+ if (icache_way1) -+ write_c0_vpeopt(read_c0_vpeopt() | VPEOPT_IWX1 ); -+ else -+ write_c0_vpeopt(read_c0_vpeopt() & ~VPEOPT_IWX1 ); -+ if (icache_way2) -+ write_c0_vpeopt(read_c0_vpeopt() | VPEOPT_IWX2 ); -+ else -+ write_c0_vpeopt(read_c0_vpeopt() & ~VPEOPT_IWX2 ); -+ if (icache_way3) -+ write_c0_vpeopt(read_c0_vpeopt() | VPEOPT_IWX3 ); -+ else -+ write_c0_vpeopt(read_c0_vpeopt() & ~VPEOPT_IWX3 ); -+ } -+ -+ if ( !vpe_dcache_shared ) { -+ /* -+ * If any cache way is 1, then that way is denied -+ * in VPE0. Otherwise assign that way to VPE0. -+ */ -+ printk(KERN_DEBUG "dcache is split\n"); -+ printk(KERN_DEBUG "dcache_way0=%d dcache_way1=%d dcache_way2=%d dcache_way3=%d\n", -+ dcache_way0, dcache_way1, dcache_way2, dcache_way3); -+ write_c0_vpeconf0((read_c0_vpeconf0()) & ~VPECONF0_DCS); -+ if (dcache_way0) -+ write_c0_vpeopt(read_c0_vpeopt() | VPEOPT_DWX0 ); -+ else -+ write_c0_vpeopt(read_c0_vpeopt() & ~VPEOPT_DWX0 ); -+ if (dcache_way1) -+ write_c0_vpeopt(read_c0_vpeopt() | VPEOPT_DWX1 ); -+ else -+ write_c0_vpeopt(read_c0_vpeopt() & ~VPEOPT_DWX1 ); -+ if (dcache_way2) -+ write_c0_vpeopt(read_c0_vpeopt() | VPEOPT_DWX2 ); -+ else -+ write_c0_vpeopt(read_c0_vpeopt() & ~VPEOPT_DWX2 ); -+ if (dcache_way3) -+ write_c0_vpeopt(read_c0_vpeopt() | VPEOPT_DWX3 ); -+ else -+ write_c0_vpeopt(read_c0_vpeopt() & ~VPEOPT_DWX3 ); -+ } -+ } -+ } -+ -+#endif /* endif CONFIG_IFX_VPE_CACHE_SPLIT */ -+ - probe_pcache(); - setup_scache(); - ---- a/arch/mips/lantiq/setup.c -+++ b/arch/mips/lantiq/setup.c -@@ -18,10 +18,11 @@ - #include "devices.h" - #include "prom.h" - -+/* assume 16M as default incase uboot fails to pass proper ramsize */ -+unsigned long physical_memsize = 16L; -+ - void __init plat_mem_setup(void) - { -- /* assume 16M as default incase uboot fails to pass proper ramsize */ -- unsigned long memsize = 16; - char **envp = (char **) KSEG1ADDR(fw_arg2); - - ioport_resource.start = IOPORT_RESOURCE_START; -@@ -35,13 +36,13 @@ void __init plat_mem_setup(void) - char *e = (char *)KSEG1ADDR(*envp); - if (!strncmp(e, "memsize=", 8)) { - e += 8; -- if (strict_strtoul(e, 0, &memsize)) -+ if (strict_strtoul(e, 0, &physical_memsize)) - pr_warn("bad memsize specified\n"); - } - envp++; - } -- memsize *= 1024 * 1024; -- add_memory_region(0x00000000, memsize, BOOT_MEM_RAM); -+ physical_memsize *= 1024 * 1024; -+ add_memory_region(0x00000000, physical_memsize, BOOT_MEM_RAM); - } - - static int __init |