Samuel Holland | b856664 | 2017-08-12 04:07:39 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <arch_helpers.h> |
| 8 | #include <assert.h> |
| 9 | #include <debug.h> |
| 10 | #include <delay_timer.h> |
| 11 | #include <mmio.h> |
| 12 | #include <platform.h> |
| 13 | #include <platform_def.h> |
| 14 | #include <psci.h> |
| 15 | #include <sunxi_mmap.h> |
| 16 | |
| 17 | #define SUNXI_WDOG0_CTRL_REG (SUNXI_WDOG_BASE + 0x0010) |
| 18 | #define SUNXI_WDOG0_CFG_REG (SUNXI_WDOG_BASE + 0x0014) |
| 19 | #define SUNXI_WDOG0_MODE_REG (SUNXI_WDOG_BASE + 0x0018) |
| 20 | |
| 21 | static void __dead2 sunxi_system_off(void) |
| 22 | { |
| 23 | ERROR("PSCI: Full shutdown not implemented, halting\n"); |
| 24 | wfi(); |
| 25 | panic(); |
| 26 | } |
| 27 | |
| 28 | static void __dead2 sunxi_system_reset(void) |
| 29 | { |
| 30 | /* Reset the whole system when the watchdog times out */ |
| 31 | mmio_write_32(SUNXI_WDOG0_CFG_REG, 1); |
| 32 | /* Enable the watchdog with the shortest timeout (0.5 seconds) */ |
| 33 | mmio_write_32(SUNXI_WDOG0_MODE_REG, (0 << 4) | 1); |
| 34 | /* Wait for twice the watchdog timeout before panicking */ |
| 35 | mdelay(1000); |
| 36 | |
| 37 | ERROR("PSCI: System reset failed\n"); |
| 38 | wfi(); |
| 39 | panic(); |
| 40 | } |
| 41 | |
| 42 | static plat_psci_ops_t sunxi_psci_ops = { |
| 43 | .system_off = sunxi_system_off, |
| 44 | .system_reset = sunxi_system_reset, |
| 45 | }; |
| 46 | |
| 47 | int plat_setup_psci_ops(uintptr_t sec_entrypoint, |
| 48 | const plat_psci_ops_t **psci_ops) |
| 49 | { |
| 50 | assert(psci_ops); |
| 51 | |
| 52 | *psci_ops = &sunxi_psci_ops; |
| 53 | |
| 54 | return 0; |
| 55 | } |