| Maheshkumar Sivasubramanian | 8ccc16e | 2011-10-25 15:59:57 -0600 | [diff] [blame^] | 1 | /* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/io.h> |
| 18 | #include "scm-boot.h" |
| 19 | #include "idle.h" |
| 20 | #include "pm-boot.h" |
| 21 | |
| 22 | static uint32_t *msm_pm_reset_vector; |
| 23 | static uint32_t saved_vector[2]; |
| 24 | static void (*msm_pm_boot_before_pc)(unsigned int cpu, unsigned long entry); |
| 25 | static void (*msm_pm_boot_after_pc)(unsigned int cpu); |
| 26 | |
| 27 | #ifdef CONFIG_MSM_SCM |
| 28 | static int __init msm_pm_tz_boot_init(void) |
| 29 | { |
| 30 | int flag = 0; |
| 31 | if (num_possible_cpus() == 1) |
| 32 | flag = SCM_FLAG_WARMBOOT_CPU0; |
| 33 | else if (num_possible_cpus() == 2) |
| 34 | flag = SCM_FLAG_WARMBOOT_CPU0 | SCM_FLAG_WARMBOOT_CPU1; |
| 35 | else |
| 36 | __WARN(); |
| 37 | |
| 38 | return scm_set_boot_addr((void *)virt_to_phys(msm_pm_boot_entry), flag); |
| 39 | } |
| 40 | |
| 41 | static void msm_pm_config_tz_before_pc(unsigned int cpu, |
| 42 | unsigned long entry) |
| 43 | { |
| 44 | msm_pm_write_boot_vector(cpu, entry); |
| 45 | } |
| 46 | #else |
| 47 | static int __init msm_pm_tz_boot_init(void) |
| 48 | { |
| 49 | return 0; |
| 50 | }; |
| 51 | |
| 52 | static inline void msm_pm_config_tz_before_pc(unsigned int cpu, |
| 53 | unsigned long entry) {} |
| 54 | #endif |
| 55 | |
| 56 | static int __init msm_pm_boot_reset_vector_init(uint32_t *reset_vector) |
| 57 | { |
| 58 | WARN_ON(!reset_vector); |
| 59 | msm_pm_reset_vector = reset_vector; |
| 60 | mb(); |
| 61 | |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | static void msm_pm_config_rst_vector_before_pc(unsigned int cpu, |
| 66 | unsigned long entry) |
| 67 | { |
| 68 | saved_vector[0] = msm_pm_reset_vector[0]; |
| 69 | saved_vector[1] = msm_pm_reset_vector[1]; |
| 70 | msm_pm_reset_vector[0] = 0xE51FF004; /* ldr pc, 4 */ |
| 71 | msm_pm_reset_vector[1] = entry; |
| 72 | } |
| 73 | |
| 74 | static void msm_pm_config_rst_vector_after_pc(unsigned int cpu) |
| 75 | { |
| 76 | msm_pm_reset_vector[0] = saved_vector[0]; |
| 77 | msm_pm_reset_vector[1] = saved_vector[1]; |
| 78 | } |
| 79 | |
| 80 | void msm_pm_boot_config_before_pc(unsigned int cpu, unsigned long entry) |
| 81 | { |
| 82 | if (msm_pm_boot_before_pc) |
| 83 | msm_pm_boot_before_pc(cpu, entry); |
| 84 | } |
| 85 | |
| 86 | void msm_pm_boot_config_after_pc(unsigned int cpu) |
| 87 | { |
| 88 | if (msm_pm_boot_after_pc) |
| 89 | msm_pm_boot_after_pc(cpu); |
| 90 | } |
| 91 | |
| 92 | int __init msm_pm_boot_init(int tz_available, uint32_t* address) |
| 93 | { |
| 94 | int ret = 0; |
| 95 | |
| 96 | switch (tz_available) { |
| 97 | case MSM_PM_BOOT_CONFIG_TZ: |
| 98 | ret = msm_pm_tz_boot_init(); |
| 99 | msm_pm_boot_before_pc = msm_pm_config_tz_before_pc; |
| 100 | msm_pm_boot_after_pc = NULL; |
| 101 | break; |
| 102 | case MSM_PM_BOOT_CONFIG_RESET_VECTOR: |
| 103 | ret = msm_pm_boot_reset_vector_init(address); |
| 104 | msm_pm_boot_before_pc |
| 105 | = msm_pm_config_rst_vector_before_pc; |
| 106 | msm_pm_boot_after_pc |
| 107 | = msm_pm_config_rst_vector_after_pc; |
| 108 | break; |
| 109 | default: |
| 110 | __WARN(); |
| 111 | } |
| 112 | |
| 113 | return ret; |
| 114 | } |