Varun Wadekar | 0f3baa0 | 2015-07-16 11:36:33 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
dp-arm | fa3cf0b | 2017-05-03 09:38:09 +0100 | [diff] [blame^] | 4 | * SPDX-License-Identifier: BSD-3-Clause |
Varun Wadekar | 0f3baa0 | 2015-07-16 11:36:33 +0530 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include <arch_helpers.h> |
| 8 | #include <assert.h> |
| 9 | #include <debug.h> |
| 10 | #include <denver.h> |
| 11 | #include <mmio.h> |
| 12 | #include <platform.h> |
| 13 | #include <psci.h> |
| 14 | #include <pmc.h> |
| 15 | #include <tegra_def.h> |
| 16 | |
| 17 | #define SB_CSR 0x0 |
| 18 | #define SB_CSR_NS_RST_VEC_WR_DIS (1 << 1) |
| 19 | |
| 20 | /* AARCH64 CPU reset vector */ |
| 21 | #define SB_AA64_RESET_LOW 0x30 /* width = 31:0 */ |
| 22 | #define SB_AA64_RESET_HI 0x34 /* width = 11:0 */ |
| 23 | |
| 24 | /* AARCH32 CPU reset vector */ |
| 25 | #define EVP_CPU_RESET_VECTOR 0x100 |
| 26 | |
| 27 | extern void tegra_secure_entrypoint(void); |
| 28 | |
| 29 | /* |
| 30 | * For T132, CPUs reset to AARCH32, so the reset vector is first |
| 31 | * armv8_trampoline which does a warm reset to AARCH64 and starts |
| 32 | * execution at the address in SB_AA64_RESET_LOW/SB_AA64_RESET_HI. |
| 33 | */ |
| 34 | __aligned(8) const uint32_t armv8_trampoline[] = { |
| 35 | 0xE3A00003, /* mov r0, #3 */ |
| 36 | 0xEE0C0F50, /* mcr p15, 0, r0, c12, c0, 2 */ |
| 37 | 0xEAFFFFFE, /* b . */ |
| 38 | }; |
| 39 | |
| 40 | /******************************************************************************* |
| 41 | * Setup secondary CPU vectors |
| 42 | ******************************************************************************/ |
| 43 | void plat_secondary_setup(void) |
| 44 | { |
| 45 | uint32_t val; |
| 46 | uint64_t reset_addr = (uint64_t)tegra_secure_entrypoint; |
| 47 | |
| 48 | /* |
| 49 | * For T132, CPUs reset to AARCH32, so the reset vector is first |
| 50 | * armv8_trampoline, which does a warm reset to AARCH64 and starts |
| 51 | * execution at the address in SCRATCH34/SCRATCH35. |
| 52 | */ |
| 53 | INFO("Setting up T132 CPU boot\n"); |
| 54 | |
| 55 | /* initial AARCH32 reset address */ |
| 56 | tegra_pmc_write_32(PMC_SECURE_SCRATCH22, |
| 57 | (unsigned long)&armv8_trampoline); |
| 58 | |
| 59 | /* set AARCH32 exception vector (read to flush) */ |
| 60 | mmio_write_32(TEGRA_EVP_BASE + EVP_CPU_RESET_VECTOR, |
| 61 | (unsigned long)&armv8_trampoline); |
| 62 | val = mmio_read_32(TEGRA_EVP_BASE + EVP_CPU_RESET_VECTOR); |
| 63 | |
| 64 | /* setup secondary CPU vector */ |
| 65 | mmio_write_32(TEGRA_SB_BASE + SB_AA64_RESET_LOW, |
| 66 | (reset_addr & 0xFFFFFFFF) | 1); |
| 67 | val = reset_addr >> 32; |
| 68 | mmio_write_32(TEGRA_SB_BASE + SB_AA64_RESET_HI, val & 0x7FF); |
| 69 | |
| 70 | /* configure PMC */ |
| 71 | tegra_pmc_cpu_setup(reset_addr); |
| 72 | tegra_pmc_lock_cpu_vectors(); |
| 73 | } |