274621cc0a
Add support for cold and warm booting of the third and fourth cpus in a quad-core processor via scm. Change-Id: Ib83a993e77092f0e4dc75f336fc38efea7a4c76d Signed-off-by: Joel King <joelking@codeaurora.org>
151 lines
3.8 KiB
C
151 lines
3.8 KiB
C
/* Copyright (c) 2011, Code Aurora Forum. 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 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <mach/msm_iomap.h>
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#include <mach/socinfo.h>
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#include <asm/mach-types.h>
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#include <asm/sizes.h>
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#include "scm-boot.h"
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#include "idle.h"
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#include "pm-boot.h"
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static uint32_t *msm_pm_reset_vector;
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static uint32_t saved_vector[2];
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static void (*msm_pm_boot_before_pc)(unsigned int cpu, unsigned long entry);
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static void (*msm_pm_boot_after_pc)(unsigned int cpu);
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#ifdef CONFIG_MSM_SCM
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static int __init msm_pm_tz_boot_init(void)
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{
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int flag = 0;
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if (num_possible_cpus() == 1)
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flag = SCM_FLAG_WARMBOOT_CPU0;
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else if (num_possible_cpus() == 2)
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flag = SCM_FLAG_WARMBOOT_CPU0 | SCM_FLAG_WARMBOOT_CPU1;
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else if (num_possible_cpus() == 4)
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flag = SCM_FLAG_WARMBOOT_CPU0 | SCM_FLAG_WARMBOOT_CPU1 |
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SCM_FLAG_WARMBOOT_CPU2 | SCM_FLAG_WARMBOOT_CPU3;
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else
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__WARN();
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return scm_set_boot_addr((void *)virt_to_phys(msm_pm_boot_entry), flag);
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}
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static void msm_pm_config_tz_before_pc(unsigned int cpu,
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unsigned long entry)
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{
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msm_pm_write_boot_vector(cpu, entry);
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}
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#else
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static int __init msm_pm_tz_boot_init(void)
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{
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return 0;
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};
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static inline void msm_pm_config_tz_before_pc(unsigned int cpu,
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unsigned long entry) {}
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#endif
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static int __init msm_pm_boot_reset_vector_init(uint32_t *reset_vector)
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{
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if (!reset_vector)
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return -ENODEV;
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msm_pm_reset_vector = reset_vector;
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mb();
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return 0;
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}
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static void msm_pm_config_rst_vector_before_pc(unsigned int cpu,
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unsigned long entry)
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{
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saved_vector[0] = msm_pm_reset_vector[0];
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saved_vector[1] = msm_pm_reset_vector[1];
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msm_pm_reset_vector[0] = 0xE51FF004; /* ldr pc, 4 */
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msm_pm_reset_vector[1] = entry;
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}
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static void msm_pm_config_rst_vector_after_pc(unsigned int cpu)
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{
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msm_pm_reset_vector[0] = saved_vector[0];
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msm_pm_reset_vector[1] = saved_vector[1];
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}
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void msm_pm_boot_config_before_pc(unsigned int cpu, unsigned long entry)
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{
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if (msm_pm_boot_before_pc)
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msm_pm_boot_before_pc(cpu, entry);
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}
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void msm_pm_boot_config_after_pc(unsigned int cpu)
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{
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if (msm_pm_boot_after_pc)
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msm_pm_boot_after_pc(cpu);
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}
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#define BOOT_REMAP_ENABLE BIT(0)
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int __init msm_pm_boot_init(struct msm_pm_boot_platform_data *pdata)
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{
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int ret = 0;
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switch (pdata->mode) {
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case MSM_PM_BOOT_CONFIG_TZ:
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ret = msm_pm_tz_boot_init();
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msm_pm_boot_before_pc = msm_pm_config_tz_before_pc;
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msm_pm_boot_after_pc = NULL;
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break;
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case MSM_PM_BOOT_CONFIG_RESET_VECTOR_PHYS:
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if (!pdata->p_addr)
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return -ENODEV;
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pdata->v_addr = ioremap(pdata->p_addr, PAGE_SIZE);
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/* Fall through */
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case MSM_PM_BOOT_CONFIG_RESET_VECTOR_VIRT:
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if (!pdata->v_addr)
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return -ENODEV;
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ret = msm_pm_boot_reset_vector_init(pdata->v_addr);
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msm_pm_boot_before_pc
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= msm_pm_config_rst_vector_before_pc;
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msm_pm_boot_after_pc
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= msm_pm_config_rst_vector_after_pc;
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break;
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case MSM_PM_BOOT_CONFIG_REMAP_BOOT_ADDR:
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/*
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* Set the boot remap address and enable remapping of
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* reset vector
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*/
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if (!pdata->p_addr || !pdata->v_addr)
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return -ENODEV;
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__raw_writel((pdata->p_addr | BOOT_REMAP_ENABLE),
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pdata->v_addr);
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ret = msm_pm_boot_reset_vector_init(__va(pdata->p_addr));
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msm_pm_boot_before_pc
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= msm_pm_config_rst_vector_before_pc;
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msm_pm_boot_after_pc
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= msm_pm_config_rst_vector_after_pc;
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break;
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default:
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__WARN();
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}
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return ret;
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}
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