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45e70b7d48
This is including fix exynos cpufreq driver compilation with ARCH_MULTIPLATFORM. Even though this is a work around, this is required for support exynos multiplatform for a while and will be updated in near future. This is based on tags/samsung-exynos. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJTiN4aAAoJEA0Cl+kVi2xqh14P/2Alq0Q4KgPmlsIIOsofADLw BEig7xQAh9iREkfKLm6Wy1K/OP99jNWdbtZnMF1UK3pTxNVPKluz3ZADdJXJWlmb UsZcu60l9ZuZ+B4vTUG7jQx2oq6sxo7aLVMyTvT+kWmzZsNWEdqMDzDATgqjPOW8 yGfWg6KwdTkpGbesID6w1h2D611RDIhJU+LpXE+AmyKWX3x/jkOxOU49CY8bKEhw ZwYw41vjTk8e2U/cBYCjqPhEuUzpFq+mmVQcVDGch/p/TFUA1/SbzuqbVDHVe+yZ qQHNZREsAWJPFJ22IjUleq/oNLiSVkJVVSkVrfXCwowzzPsw+cLFDuSRaJMROm1a baR77C0TJREqoXu4FexBSoWLPYbn7aUOlZ3wGmr/7MnPK/bK3e9BGiOsJ8GPIQuF e2ytESFl15ABduY0lV0H/TtOxjx8JZJf+xxh0Ip0qoE8XNkNxt5cIsMW7LD/NcaE zUuPoO+w97pUxyVDrTPXakLRdn643PmYRX+rMG8gXP82m/CiCKe+x8znc7BkXIq2 h8rvSLqnWQFYUdEj/0/T8scRT5DyZPjSTDguUj+lhDU2rE0gWNCHEO+2a7Qwm8Js YfeQ4dd71ZNqzw8Ui62do2HzNGIA/FWPwQBzHeu2tPxVrWOwSQz/zSA4TLwjeB3J n1Tzm9JOJNwH3FTAcH9k =SQbr -----END PGP SIGNATURE----- Merge tag 'samsung-drivers-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/drivers Merge "Samsung 2nd drivers for 3.16" from Kukjin Kim: This is including fix exynos cpufreq driver compilation with ARCH_MULTIPLATFORM. Even though this is a work around, this is required for support exynos multiplatform for a while and will be updated in near future. This is based on tags/samsung-exynos. * tag 'samsung-drivers-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: (24 commits) cpufreq: exynos: Fix driver compilation with ARCH_MULTIPLATFORM ARM: EXYNOS: Enable multi-platform build support ARM: EXYNOS: Consolidate Kconfig entries ARM: EXYNOS: Add support for EXYNOS5410 SoC ARM: EXYNOS: Support secondary CPU boot of Exynos3250 ARM: EXYNOS: Add Exynos3250 SoC ID ARM: EXYNOS: Add 5800 SoC support ARM: EXYNOS: initial board support for exynos5260 SoC clk: exynos5250: Add missing sysmmu clocks for DISP and ISP blocks cpufreq: exynos: Fix the compile error ARM: S3C24XX: move debug-macro.S into the common space ARM: S3C24XX: use generic DEBUG_UART_PHY/_VIRT in debug macro ARM: S3C24XX: trim down debug uart handling ARM: compressed/head.S: remove s3c24xx special case ARM: EXYNOS: Remove unnecessary inclusion of cpu.h ARM: EXYNOS: Migrate Exynos specific macros from plat to mach ARM: EXYNOS: Remove exynos_subsys registration ARM: EXYNOS: Remove duplicate lines in Makefile ARM: EXYNOS: use v7_exit_coherency_flush macro for cache disabling ARM: dts: Remove g2d_pd node for exynos5420 ... Signed-off-by: Olof Johansson <olof@lixom.net>
97 lines
1.9 KiB
C
97 lines
1.9 KiB
C
/* linux arch/arm/mach-exynos4/hotplug.c
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*
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* Cloned from linux/arch/arm/mach-realview/hotplug.c
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*
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* Copyright (C) 2002 ARM Ltd.
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/smp.h>
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#include <linux/io.h>
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#include <asm/cacheflush.h>
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#include <asm/cp15.h>
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#include <asm/smp_plat.h>
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#include "common.h"
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#include "regs-pmu.h"
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static inline void cpu_leave_lowpower(void)
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{
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unsigned int v;
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asm volatile(
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"mrc p15, 0, %0, c1, c0, 0\n"
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" orr %0, %0, %1\n"
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" mcr p15, 0, %0, c1, c0, 0\n"
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" mrc p15, 0, %0, c1, c0, 1\n"
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" orr %0, %0, %2\n"
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" mcr p15, 0, %0, c1, c0, 1\n"
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: "=&r" (v)
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: "Ir" (CR_C), "Ir" (0x40)
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: "cc");
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}
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static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
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{
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for (;;) {
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/* make cpu1 to be turned off at next WFI command */
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if (cpu == 1)
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exynos_cpu_power_down(cpu);
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/*
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* here's the WFI
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*/
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asm(".word 0xe320f003\n"
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:
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:
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: "memory", "cc");
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if (pen_release == cpu_logical_map(cpu)) {
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/*
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* OK, proper wakeup, we're done
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*/
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break;
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}
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/*
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* Getting here, means that we have come out of WFI without
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* having been woken up - this shouldn't happen
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*
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* Just note it happening - when we're woken, we can report
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* its occurrence.
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*/
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(*spurious)++;
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}
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}
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/*
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* platform-specific code to shutdown a CPU
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*
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* Called with IRQs disabled
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*/
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void __ref exynos_cpu_die(unsigned int cpu)
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{
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int spurious = 0;
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v7_exit_coherency_flush(louis);
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platform_do_lowpower(cpu, &spurious);
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/*
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* bring this CPU back into the world of cache
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* coherency, and then restore interrupts
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*/
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cpu_leave_lowpower();
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if (spurious)
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pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious);
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}
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