diff options
Diffstat (limited to 'target/linux/cns3xxx/patches-3.0/003-cns3xxx_l2cache.patch')
| -rw-r--r-- | target/linux/cns3xxx/patches-3.0/003-cns3xxx_l2cache.patch | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/target/linux/cns3xxx/patches-3.0/003-cns3xxx_l2cache.patch b/target/linux/cns3xxx/patches-3.0/003-cns3xxx_l2cache.patch new file mode 100644 index 000000000..8bd3ac8c5 --- /dev/null +++ b/target/linux/cns3xxx/patches-3.0/003-cns3xxx_l2cache.patch @@ -0,0 +1,108 @@ +CNS3xxx SOCs have L310-compatible cache controller, so let's use it. + +With this patch benchmarking with 'gzip' shows that performance is +doubled, and I'm still able to boot full-fledged userland over NFS +(using PCIe NIC), so the support should be pretty robust. + +Signed-off-by: Anton Vorontsov <avorontsov@mvista.com> +--- + + arch/arm/mach-cns3xxx/cns3420vb.c | 2 + + arch/arm/mach-cns3xxx/core.c | 43 +++++++++++++++++++++++++++++++++++++ + arch/arm/mach-cns3xxx/core.h | 6 +++++ + arch/arm/mm/Kconfig | 2 +- + 4 files changed, 52 insertions(+), 1 deletions(-) + +--- a/arch/arm/mach-cns3xxx/cns3420vb.c ++++ b/arch/arm/mach-cns3xxx/cns3420vb.c +@@ -192,6 +192,8 @@ static struct platform_device *cns3420_p + + static void __init cns3420_init(void) + { ++ cns3xxx_l2x0_init(); ++ + platform_add_devices(cns3420_pdevs, ARRAY_SIZE(cns3420_pdevs)); + + cns3xxx_ahci_init(); +--- a/arch/arm/mach-cns3xxx/core.c ++++ b/arch/arm/mach-cns3xxx/core.c +@@ -16,6 +16,7 @@ + #include <asm/mach/time.h> + #include <asm/mach/irq.h> + #include <asm/hardware/gic.h> ++#include <asm/hardware/cache-l2x0.h> + #include <mach/cns3xxx.h> + #include "core.h" + +@@ -244,3 +245,45 @@ static void __init cns3xxx_timer_init(vo + struct sys_timer cns3xxx_timer = { + .init = cns3xxx_timer_init, + }; ++ ++#ifdef CONFIG_CACHE_L2X0 ++ ++void __init cns3xxx_l2x0_init(void) ++{ ++ void __iomem *base = ioremap(CNS3XXX_L2C_BASE, SZ_4K); ++ u32 val; ++ ++ if (WARN_ON(!base)) ++ return; ++ ++ /* ++ * Tag RAM Control register ++ * ++ * bit[10:8] - 1 cycle of write accesses latency ++ * bit[6:4] - 1 cycle of read accesses latency ++ * bit[3:0] - 1 cycle of setup latency ++ * ++ * 1 cycle of latency for setup, read and write accesses ++ */ ++ val = readl(base + L2X0_TAG_LATENCY_CTRL); ++ val &= 0xfffff888; ++ writel(val, base + L2X0_TAG_LATENCY_CTRL); ++ ++ /* ++ * Data RAM Control register ++ * ++ * bit[10:8] - 1 cycles of write accesses latency ++ * bit[6:4] - 1 cycles of read accesses latency ++ * bit[3:0] - 1 cycle of setup latency ++ * ++ * 1 cycle of latency for setup, read and write accesses ++ */ ++ val = readl(base + L2X0_DATA_LATENCY_CTRL); ++ val &= 0xfffff888; ++ writel(val, base + L2X0_DATA_LATENCY_CTRL); ++ ++ /* 32 KiB, 8-way, parity disable */ ++ l2x0_init(base, 0x00540000, 0xfe000fff); ++} ++ ++#endif /* CONFIG_CACHE_L2X0 */ +--- a/arch/arm/mach-cns3xxx/core.h ++++ b/arch/arm/mach-cns3xxx/core.h +@@ -13,6 +13,12 @@ + + extern struct sys_timer cns3xxx_timer; + ++#ifdef CONFIG_CACHE_L2X0 ++void __init cns3xxx_l2x0_init(void); ++#else ++static inline void cns3xxx_l2x0_init(void) {} ++#endif /* CONFIG_CACHE_L2X0 */ ++ + void __init cns3xxx_map_io(void); + void __init cns3xxx_init_irq(void); + void cns3xxx_power_off(void); +--- a/arch/arm/mm/Kconfig ++++ b/arch/arm/mm/Kconfig +@@ -821,7 +821,7 @@ config CACHE_L2X0 + depends on REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || MACH_REALVIEW_PB1176 || \ + REALVIEW_EB_A9MP || SOC_IMX35 || SOC_IMX31 || MACH_REALVIEW_PBX || \ + ARCH_NOMADIK || ARCH_OMAP4 || ARCH_EXYNOS4 || ARCH_TEGRA || \ +- ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || ARCH_SHMOBILE ++ ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || ARCH_SHMOBILE || ARCH_CNS3XXX + default y + select OUTER_CACHE + select OUTER_CACHE_SYNC |