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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/arm/mach-ux500/cache-l2x0.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/arm/mach-ux500/cache-l2x0.c')
-rw-r--r-- | arch/arm/mach-ux500/cache-l2x0.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/cache-l2x0.c b/arch/arm/mach-ux500/cache-l2x0.c new file mode 100644 index 00000000..77a75ed0 --- /dev/null +++ b/arch/arm/mach-ux500/cache-l2x0.c @@ -0,0 +1,66 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * + * License terms: GNU General Public License (GPL) version 2 + */ + +#include <linux/io.h> +#include <linux/of.h> + +#include <asm/cacheflush.h> +#include <asm/hardware/cache-l2x0.h> +#include <mach/hardware.h> +#include <mach/id.h> + +static void __iomem *l2x0_base; + +static int __init ux500_l2x0_unlock(void) +{ + int i; + + /* + * Unlock Data and Instruction Lock if locked. Ux500 U-Boot versions + * apparently locks both caches before jumping to the kernel. The + * l2x0 core will not touch the unlock registers if the l2x0 is + * already enabled, so we do it right here instead. The PL310 has + * 8 sets of registers, one per possible CPU. + */ + for (i = 0; i < 8; i++) { + writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_D_BASE + + i * L2X0_LOCKDOWN_STRIDE); + writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE + + i * L2X0_LOCKDOWN_STRIDE); + } + return 0; +} + +static int __init ux500_l2x0_init(void) +{ + if (cpu_is_u5500()) + l2x0_base = __io_address(U5500_L2CC_BASE); + else if (cpu_is_u8500()) + l2x0_base = __io_address(U8500_L2CC_BASE); + else + ux500_unknown_soc(); + + /* Unlock before init */ + ux500_l2x0_unlock(); + + /* 64KB way size, 8 way associativity, force WA */ + if (of_have_populated_dt()) + l2x0_of_init(0x3e060000, 0xc0000fff); + else + l2x0_init(l2x0_base, 0x3e060000, 0xc0000fff); + + /* + * We can't disable l2 as we are in non secure mode, currently + * this seems be called only during kexec path. So let's + * override outer.disable with nasty assignment until we have + * some SMI service available. + */ + outer_cache.disable = NULL; + + return 0; +} + +early_initcall(ux500_l2x0_init); |