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https://github.com/torvalds/linux
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29746f48d1
This platform has been obsoleted and was only available inside of ST-Ericsson, no users of this code are left in the world. This deletes the core U5500 support entirely in the same manner as the obsoleted U8500 silicon was previously deleted. The cpu_is_u5500() macros that can read out the CPU ID is left until the next kernel cycle, this makes it possible to merge deletion of dependent drivers without breakage. This also has the upside of removing the mailbox driver which was our only driver that was outside the drivers/* hiearchy, now the machine directory only handles machines and nothing else. Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> Cc: Rabin Vincent <rabin.vincent@stericsson.com> Cc: Jonas Aberg <jonas.aberg@stericsson.com> Cc: Per Forlin <per.forlin@stericsson.com> Cc: Ulf Hansson <ulf.hansson@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
/*
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* Copyright (C) ST-Ericsson SA 2011
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*
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* License terms: GNU General Public License (GPL) version 2
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*/
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#include <linux/io.h>
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#include <linux/of.h>
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#include <asm/cacheflush.h>
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#include <asm/hardware/cache-l2x0.h>
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#include <mach/hardware.h>
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#include <mach/id.h>
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static void __iomem *l2x0_base;
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static int __init ux500_l2x0_unlock(void)
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{
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int i;
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/*
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* Unlock Data and Instruction Lock if locked. Ux500 U-Boot versions
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* apparently locks both caches before jumping to the kernel. The
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* l2x0 core will not touch the unlock registers if the l2x0 is
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* already enabled, so we do it right here instead. The PL310 has
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* 8 sets of registers, one per possible CPU.
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*/
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for (i = 0; i < 8; i++) {
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writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_D_BASE +
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i * L2X0_LOCKDOWN_STRIDE);
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writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE +
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i * L2X0_LOCKDOWN_STRIDE);
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}
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return 0;
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}
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static int __init ux500_l2x0_init(void)
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{
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if (cpu_is_u8500())
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l2x0_base = __io_address(U8500_L2CC_BASE);
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else
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ux500_unknown_soc();
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/* Unlock before init */
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ux500_l2x0_unlock();
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/* 64KB way size, 8 way associativity, force WA */
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if (of_have_populated_dt())
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l2x0_of_init(0x3e060000, 0xc0000fff);
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else
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l2x0_init(l2x0_base, 0x3e060000, 0xc0000fff);
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/*
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* We can't disable l2 as we are in non secure mode, currently
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* this seems be called only during kexec path. So let's
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* override outer.disable with nasty assignment until we have
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* some SMI service available.
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*/
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outer_cache.disable = NULL;
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return 0;
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}
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early_initcall(ux500_l2x0_init);
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