| Yoshihiro Shimoda | f9913a8 | 2007-12-03 22:58:45 +0900 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2007 |
| 3 | * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> |
| 4 | * |
| 5 | * (C) Copyright 2007 |
| 6 | * Nobobuhiro Iwamatsu <iwamatsu@nigauri.org> |
| 7 | * |
| Wolfgang Denk | 1a45966 | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 8 | * SPDX-License-Identifier: GPL-2.0+ |
| Yoshihiro Shimoda | f9913a8 | 2007-12-03 22:58:45 +0900 | [diff] [blame] | 9 | */ |
| 10 | |
| 11 | #include <common.h> |
| 12 | #include <command.h> |
| 13 | #include <asm/processor.h> |
| 14 | #include <asm/io.h> |
| 15 | |
| 16 | /* |
| 17 | * Jump to P2 area. |
| 18 | * When handling TLB or caches, we need to do it from P2 area. |
| 19 | */ |
| 20 | #define jump_to_P2() \ |
| 21 | do { \ |
| 22 | unsigned long __dummy; \ |
| 23 | __asm__ __volatile__( \ |
| 24 | "mov.l 1f, %0\n\t" \ |
| 25 | "or %1, %0\n\t" \ |
| 26 | "jmp @%0\n\t" \ |
| 27 | " nop\n\t" \ |
| 28 | ".balign 4\n" \ |
| 29 | "1: .long 2f\n" \ |
| 30 | "2:" \ |
| 31 | : "=&r" (__dummy) \ |
| 32 | : "r" (0x20000000)); \ |
| 33 | } while (0) |
| 34 | |
| 35 | /* |
| 36 | * Back to P1 area. |
| 37 | */ |
| 38 | #define back_to_P1() \ |
| 39 | do { \ |
| 40 | unsigned long __dummy; \ |
| 41 | __asm__ __volatile__( \ |
| 42 | "nop;nop;nop;nop;nop;nop;nop\n\t" \ |
| 43 | "mov.l 1f, %0\n\t" \ |
| 44 | "jmp @%0\n\t" \ |
| 45 | " nop\n\t" \ |
| 46 | ".balign 4\n" \ |
| 47 | "1: .long 2f\n" \ |
| 48 | "2:" \ |
| 49 | : "=&r" (__dummy)); \ |
| 50 | } while (0) |
| 51 | |
| 52 | #define CACHE_VALID 1 |
| 53 | #define CACHE_UPDATED 2 |
| 54 | |
| 55 | static inline void cache_wback_all(void) |
| 56 | { |
| 57 | unsigned long addr, data, i, j; |
| 58 | |
| 59 | jump_to_P2(); |
| 60 | for (i = 0; i < CACHE_OC_NUM_ENTRIES; i++) { |
| 61 | for (j = 0; j < CACHE_OC_NUM_WAYS; j++) { |
| 62 | addr = CACHE_OC_ADDRESS_ARRAY |
| 63 | | (j << CACHE_OC_WAY_SHIFT) |
| 64 | | (i << CACHE_OC_ENTRY_SHIFT); |
| 65 | data = inl(addr); |
| 66 | if (data & CACHE_UPDATED) { |
| 67 | data &= ~CACHE_UPDATED; |
| 68 | outl(data, addr); |
| 69 | } |
| 70 | } |
| 71 | } |
| 72 | back_to_P1(); |
| 73 | } |
| 74 | |
| 75 | |
| 76 | #define CACHE_ENABLE 0 |
| 77 | #define CACHE_DISABLE 1 |
| 78 | |
| 79 | int cache_control(unsigned int cmd) |
| 80 | { |
| 81 | unsigned long ccr; |
| 82 | |
| 83 | jump_to_P2(); |
| 84 | ccr = inl(CCR); |
| 85 | |
| 86 | if (ccr & CCR_CACHE_ENABLE) |
| 87 | cache_wback_all(); |
| 88 | |
| 89 | if (cmd == CACHE_DISABLE) |
| 90 | outl(CCR_CACHE_STOP, CCR); |
| 91 | else |
| 92 | outl(CCR_CACHE_INIT, CCR); |
| 93 | back_to_P1(); |
| 94 | |
| 95 | return 0; |
| 96 | } |