| Jiafei Pan | 8dad316 | 2021-09-27 12:20:09 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2021 NXP |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <asm_macros.S> |
| 8 | |
| 9 | #include <soc_default_base_addr.h> |
| 10 | #include <soc_default_helper_macros.h> |
| 11 | |
| 12 | .global ocram_init |
| 13 | |
| 14 | /* |
| 15 | * void ocram_init(uintptr_t start_addr, size_t size) |
| 16 | * |
| 17 | * This function will do OCRAM ECC. |
| 18 | * OCRAM is initialized with 64-bit writes and then a write |
| 19 | * performed to address 0x0010_0534 with the value 0x0000_0008. |
| 20 | * |
| 21 | * x0: start_addr |
| 22 | * x1: size in bytes |
| 23 | * Called from C |
| 24 | */ |
| 25 | |
| 26 | func ocram_init |
| 27 | /* save the aarch32/64 non-volatile registers */ |
| 28 | stp x4, x5, [sp, #-16]! |
| 29 | stp x6, x7, [sp, #-16]! |
| 30 | stp x8, x9, [sp, #-16]! |
| 31 | stp x10, x11, [sp, #-16]! |
| 32 | stp x12, x13, [sp, #-16]! |
| 33 | stp x18, x30, [sp, #-16]! |
| 34 | |
| 35 | /* convert bytes to 64-byte chunks */ |
| 36 | lsr x1, x1, #6 |
| 37 | 1: |
| 38 | /* for each location, read and write-back */ |
| 39 | dc ivac, x0 |
| 40 | dsb sy |
| 41 | ldp x4, x5, [x0] |
| 42 | ldp x6, x7, [x0, #16] |
| 43 | ldp x8, x9, [x0, #32] |
| 44 | ldp x10, x11, [x0, #48] |
| 45 | stp x4, x5, [x0] |
| 46 | stp x6, x7, [x0, #16] |
| 47 | stp x8, x9, [x0, #32] |
| 48 | stp x10, x11, [x0, #48] |
| 49 | dc cvac, x0 |
| 50 | |
| 51 | sub x1, x1, #1 |
| 52 | cbz x1, 2f |
| 53 | add x0, x0, #64 |
| 54 | b 1b |
| 55 | 2: |
| 56 | /* Clear OCRAM ECC status bit in SBEESR2 and MBEESR2 */ |
| 57 | ldr w1, =OCRAM_EESR_MASK |
| 58 | ldr x0, =DCFG_SBEESR2_ADDR |
| 59 | str w1, [x0] |
| 60 | ldr x0, =DCFG_MBEESR2_ADDR |
| 61 | str w1, [x0] |
| 62 | |
| 63 | /* restore the aarch32/64 non-volatile registers */ |
| 64 | ldp x18, x30, [sp], #16 |
| 65 | ldp x12, x13, [sp], #16 |
| 66 | ldp x10, x11, [sp], #16 |
| 67 | ldp x8, x9, [sp], #16 |
| 68 | ldp x6, x7, [sp], #16 |
| 69 | ldp x4, x5, [sp], #16 |
| 70 | ret |
| 71 | endfunc ocram_init |