x86/boot: Rename overlapping memcpy() to memmove()
[linux/fpc-iii.git] / arch / arm / mach-exynos / firmware.c
blob1bfd1b0bd9dca8a339329cf8d49acfa996f528aa
1 /*
2 * Copyright (C) 2012 Samsung Electronics.
3 * Kyungmin Park <kyungmin.park@samsung.com>
4 * Tomasz Figa <t.figa@samsung.com>
6 * This program is free software,you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
11 #include <linux/kernel.h>
12 #include <linux/io.h>
13 #include <linux/init.h>
14 #include <linux/of.h>
15 #include <linux/of_address.h>
17 #include <asm/cacheflush.h>
18 #include <asm/cputype.h>
19 #include <asm/firmware.h>
20 #include <asm/hardware/cache-l2x0.h>
21 #include <asm/suspend.h>
23 #include "common.h"
24 #include "smc.h"
26 #define EXYNOS_BOOT_ADDR 0x8
27 #define EXYNOS_BOOT_FLAG 0xc
29 static void exynos_save_cp15(void)
31 /* Save Power control and Diagnostic registers */
32 asm ("mrc p15, 0, %0, c15, c0, 0\n"
33 "mrc p15, 0, %1, c15, c0, 1\n"
34 : "=r" (cp15_save_power), "=r" (cp15_save_diag)
35 : : "cc");
38 static int exynos_do_idle(unsigned long mode)
40 switch (mode) {
41 case FW_DO_IDLE_AFTR:
42 if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9)
43 exynos_save_cp15();
44 __raw_writel(virt_to_phys(exynos_cpu_resume_ns),
45 sysram_ns_base_addr + 0x24);
46 __raw_writel(EXYNOS_AFTR_MAGIC, sysram_ns_base_addr + 0x20);
47 if (soc_is_exynos3250()) {
48 flush_cache_all();
49 exynos_smc(SMC_CMD_SAVE, OP_TYPE_CORE,
50 SMC_POWERSTATE_IDLE, 0);
51 exynos_smc(SMC_CMD_SHUTDOWN, OP_TYPE_CLUSTER,
52 SMC_POWERSTATE_IDLE, 0);
53 } else
54 exynos_smc(SMC_CMD_CPU0AFTR, 0, 0, 0);
55 break;
56 case FW_DO_IDLE_SLEEP:
57 exynos_smc(SMC_CMD_SLEEP, 0, 0, 0);
59 return 0;
62 static int exynos_cpu_boot(int cpu)
65 * Exynos3250 doesn't need to send smc command for secondary CPU boot
66 * because Exynos3250 removes WFE in secure mode.
68 if (soc_is_exynos3250())
69 return 0;
72 * The second parameter of SMC_CMD_CPU1BOOT command means CPU id.
73 * But, Exynos4212 has only one secondary CPU so second parameter
74 * isn't used for informing secure firmware about CPU id.
76 if (soc_is_exynos4212())
77 cpu = 0;
79 exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0);
80 return 0;
83 static int exynos_set_cpu_boot_addr(int cpu, unsigned long boot_addr)
85 void __iomem *boot_reg;
87 if (!sysram_ns_base_addr)
88 return -ENODEV;
90 boot_reg = sysram_ns_base_addr + 0x1c;
93 * Almost all Exynos-series of SoCs that run in secure mode don't need
94 * additional offset for every CPU, with Exynos4412 being the only
95 * exception.
97 if (soc_is_exynos4412())
98 boot_reg += 4 * cpu;
100 __raw_writel(boot_addr, boot_reg);
101 return 0;
104 static int exynos_get_cpu_boot_addr(int cpu, unsigned long *boot_addr)
106 void __iomem *boot_reg;
108 if (!sysram_ns_base_addr)
109 return -ENODEV;
111 boot_reg = sysram_ns_base_addr + 0x1c;
113 if (soc_is_exynos4412())
114 boot_reg += 4 * cpu;
116 *boot_addr = __raw_readl(boot_reg);
117 return 0;
120 static int exynos_cpu_suspend(unsigned long arg)
122 flush_cache_all();
123 outer_flush_all();
125 exynos_smc(SMC_CMD_SLEEP, 0, 0, 0);
127 pr_info("Failed to suspend the system\n");
128 writel(0, sysram_ns_base_addr + EXYNOS_BOOT_FLAG);
129 return 1;
132 static int exynos_suspend(void)
134 if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9)
135 exynos_save_cp15();
137 writel(EXYNOS_SLEEP_MAGIC, sysram_ns_base_addr + EXYNOS_BOOT_FLAG);
138 writel(virt_to_phys(exynos_cpu_resume_ns),
139 sysram_ns_base_addr + EXYNOS_BOOT_ADDR);
141 return cpu_suspend(0, exynos_cpu_suspend);
144 static int exynos_resume(void)
146 writel(0, sysram_ns_base_addr + EXYNOS_BOOT_FLAG);
148 return 0;
151 static const struct firmware_ops exynos_firmware_ops = {
152 .do_idle = IS_ENABLED(CONFIG_EXYNOS_CPU_SUSPEND) ? exynos_do_idle : NULL,
153 .set_cpu_boot_addr = exynos_set_cpu_boot_addr,
154 .get_cpu_boot_addr = exynos_get_cpu_boot_addr,
155 .cpu_boot = exynos_cpu_boot,
156 .suspend = IS_ENABLED(CONFIG_PM_SLEEP) ? exynos_suspend : NULL,
157 .resume = IS_ENABLED(CONFIG_EXYNOS_CPU_SUSPEND) ? exynos_resume : NULL,
160 static void exynos_l2_write_sec(unsigned long val, unsigned reg)
162 static int l2cache_enabled;
164 switch (reg) {
165 case L2X0_CTRL:
166 if (val & L2X0_CTRL_EN) {
168 * Before the cache can be enabled, due to firmware
169 * design, SMC_CMD_L2X0INVALL must be called.
171 if (!l2cache_enabled) {
172 exynos_smc(SMC_CMD_L2X0INVALL, 0, 0, 0);
173 l2cache_enabled = 1;
175 } else {
176 l2cache_enabled = 0;
178 exynos_smc(SMC_CMD_L2X0CTRL, val, 0, 0);
179 break;
181 case L2X0_DEBUG_CTRL:
182 exynos_smc(SMC_CMD_L2X0DEBUG, val, 0, 0);
183 break;
185 default:
186 WARN_ONCE(1, "%s: ignoring write to reg 0x%x\n", __func__, reg);
190 static void exynos_l2_configure(const struct l2x0_regs *regs)
192 exynos_smc(SMC_CMD_L2X0SETUP1, regs->tag_latency, regs->data_latency,
193 regs->prefetch_ctrl);
194 exynos_smc(SMC_CMD_L2X0SETUP2, regs->pwr_ctrl, regs->aux_ctrl, 0);
197 void __init exynos_firmware_init(void)
199 struct device_node *nd;
200 const __be32 *addr;
202 nd = of_find_compatible_node(NULL, NULL,
203 "samsung,secure-firmware");
204 if (!nd)
205 return;
207 addr = of_get_address(nd, 0, NULL, NULL);
208 if (!addr) {
209 pr_err("%s: No address specified.\n", __func__);
210 return;
213 pr_info("Running under secure firmware.\n");
215 register_firmware_ops(&exynos_firmware_ops);
218 * Exynos 4 SoCs (based on Cortex A9 and equipped with L2C-310),
219 * running under secure firmware, require certain registers of L2
220 * cache controller to be written in secure mode. Here .write_sec
221 * callback is provided to perform necessary SMC calls.
223 if (IS_ENABLED(CONFIG_CACHE_L2X0) &&
224 read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) {
225 outer_cache.write_sec = exynos_l2_write_sec;
226 outer_cache.configure = exynos_l2_configure;
230 #define REG_CPU_STATE_ADDR (sysram_ns_base_addr + 0x28)
231 #define BOOT_MODE_MASK 0x1f
233 void exynos_set_boot_flag(unsigned int cpu, unsigned int mode)
235 unsigned int tmp;
237 tmp = __raw_readl(REG_CPU_STATE_ADDR + cpu * 4);
239 if (mode & BOOT_MODE_MASK)
240 tmp &= ~BOOT_MODE_MASK;
242 tmp |= mode;
243 __raw_writel(tmp, REG_CPU_STATE_ADDR + cpu * 4);
246 void exynos_clear_boot_flag(unsigned int cpu, unsigned int mode)
248 unsigned int tmp;
250 tmp = __raw_readl(REG_CPU_STATE_ADDR + cpu * 4);
251 tmp &= ~mode;
252 __raw_writel(tmp, REG_CPU_STATE_ADDR + cpu * 4);