| Konstantin Porotchkin | e7be6e2 | 2018-10-08 16:53:09 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 Marvell International Ltd. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | * https://spdx.org/licenses |
| 6 | */ |
| 7 | |
| 8 | #include <asm_macros.S> |
| 9 | #include <platform_def.h> |
| 10 | |
| 11 | .globl plat_secondary_cold_boot_setup |
| 12 | .globl plat_get_my_entrypoint |
| 13 | .globl plat_is_my_cpu_primary |
| 14 | |
| 15 | /* ----------------------------------------------------- |
| 16 | * void plat_secondary_cold_boot_setup (void); |
| 17 | * |
| 18 | * This function performs any platform specific actions |
| 19 | * needed for a secondary cpu after a cold reset. Right |
| 20 | * now this is a stub function. |
| 21 | * ----------------------------------------------------- |
| 22 | */ |
| 23 | func plat_secondary_cold_boot_setup |
| 24 | mov x0, #0 |
| 25 | ret |
| 26 | endfunc plat_secondary_cold_boot_setup |
| 27 | |
| 28 | /* --------------------------------------------------------------------- |
| 29 | * unsigned long plat_get_my_entrypoint (void); |
| 30 | * |
| 31 | * Main job of this routine is to distinguish between cold and warm boot |
| 32 | * For a cold boot, return 0. |
| 33 | * For a warm boot, read the mailbox and return the address it contains. |
| 34 | * A magic number is placed before entrypoint to avoid mistake caused by |
| 35 | * uninitialized mailbox data area. |
| 36 | * --------------------------------------------------------------------- |
| 37 | */ |
| 38 | func plat_get_my_entrypoint |
| 39 | /* Read first word and compare it with magic num */ |
| 40 | mov_imm x0, PLAT_MARVELL_MAILBOX_BASE |
| 41 | ldr x1, [x0] |
| 42 | mov_imm x2, PLAT_MARVELL_MAILBOX_MAGIC_NUM |
| 43 | cmp x1, x2 |
| 44 | /* If compare failed, return 0, i.e. cold boot */ |
| 45 | beq entrypoint |
| 46 | mov x0, #0 |
| 47 | ret |
| 48 | entrypoint: |
| 49 | /* Second word contains the jump address */ |
| 50 | add x0, x0, #8 |
| 51 | ldr x0, [x0] |
| 52 | ret |
| 53 | endfunc plat_get_my_entrypoint |
| 54 | |
| 55 | /* ----------------------------------------------------- |
| 56 | * unsigned int plat_is_my_cpu_primary (void); |
| 57 | * |
| 58 | * Find out whether the current cpu is the primary |
| 59 | * cpu. |
| 60 | * ----------------------------------------------------- |
| 61 | */ |
| 62 | func plat_is_my_cpu_primary |
| 63 | mrs x0, mpidr_el1 |
| 64 | and x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK) |
| 65 | cmp x0, #MVEBU_PRIMARY_CPU |
| 66 | cset w0, eq |
| 67 | ret |
| 68 | endfunc plat_is_my_cpu_primary |