1 /* 2 * Copyright (C) 2012 Samsung Electronics. 3 * Kyungmin Park <kyungmin.park@samsung.com> 4 * Tomasz Figa <t.figa@samsung.com> 5 * 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 */ 10 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> 16 17 #include <asm/firmware.h> 18 19 #include <mach/map.h> 20 21 #include <plat/cpu.h> 22 23 #include "smc.h" 24 25 static int exynos_do_idle(void) 26 { 27 exynos_smc(SMC_CMD_SLEEP, 0, 0, 0); 28 return 0; 29 } 30 31 static int exynos_cpu_boot(int cpu) 32 { 33 /* 34 * The second parameter of SMC_CMD_CPU1BOOT command means CPU id. 35 * But, Exynos4212 has only one secondary CPU so second parameter 36 * isn't used for informing secure firmware about CPU id. 37 */ 38 if (soc_is_exynos4212()) 39 cpu = 0; 40 41 exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0); 42 return 0; 43 } 44 45 static int exynos_set_cpu_boot_addr(int cpu, unsigned long boot_addr) 46 { 47 void __iomem *boot_reg = S5P_VA_SYSRAM_NS + 0x1c; 48 49 if (!soc_is_exynos4212()) 50 boot_reg += 4*cpu; 51 52 __raw_writel(boot_addr, boot_reg); 53 return 0; 54 } 55 56 static const struct firmware_ops exynos_firmware_ops = { 57 .do_idle = exynos_do_idle, 58 .set_cpu_boot_addr = exynos_set_cpu_boot_addr, 59 .cpu_boot = exynos_cpu_boot, 60 }; 61 62 void __init exynos_firmware_init(void) 63 { 64 struct device_node *nd; 65 const __be32 *addr; 66 67 nd = of_find_compatible_node(NULL, NULL, 68 "samsung,secure-firmware"); 69 if (!nd) 70 return; 71 72 addr = of_get_address(nd, 0, NULL, NULL); 73 if (!addr) { 74 pr_err("%s: No address specified.\n", __func__); 75 return; 76 } 77 78 pr_info("Running under secure firmware.\n"); 79 80 register_firmware_ops(&exynos_firmware_ops); 81 } 82