diff options
Diffstat (limited to 'src/cpu/ppc/mpc74xx')
| -rw-r--r-- | src/cpu/ppc/mpc74xx/mpc74xx.inc | 75 |
1 files changed, 38 insertions, 37 deletions
diff --git a/src/cpu/ppc/mpc74xx/mpc74xx.inc b/src/cpu/ppc/mpc74xx/mpc74xx.inc index 5f6cee20dc..3391b28a44 100644 --- a/src/cpu/ppc/mpc74xx/mpc74xx.inc +++ b/src/cpu/ppc/mpc74xx/mpc74xx.inc @@ -13,9 +13,9 @@ * * - enable L1 I/D caches, otherwise performance will be slow * - set up DBATs for the following regions: - * - RAM (generally 0x00000000 - 0x7fffffff) - * - ROM (_ROMBASE - _ROMBASE + 16Mb) - * - I/O (generally 0xfc000000 - 0xfdffffff) + * - RAM (generally 0x00000000 -> 0x7fffffff) + * - ROM (_ROMBASE -> _ROMBASE + ROM_SIZE) + * - I/O (generally 0xfc000000 -> 0xfdffffff) * - the main purpose for setting up the DBATs is so the I/O region * can be marked cache inhibited/write through * - set up IBATs for RAM and ROM @@ -92,18 +92,19 @@ /* * Set up DBATs * - * DBAT0 covers RAM (0 - 256Mb) - * DBAT1 covers PCI memory and ROM (0xFC000000 - 0xFFFFFFFF) - * DBAT1 covers PCI memory (0x80000000 - 0x8FFFFFFF) + * DBAT0 covers RAM (0 -> 0x0FFFFFFF) (256Mb) + * DBAT1 covers PCI memory and ROM (0xFD000000 -> 0xFFFFFFFF) (64Mb) + * DBAT2 covers PCI memory (0x80000000 -> 0x8FFFFFFF) (256Mb) + * DBAT3 is not used */ - lis r2, 0@ha + lis r2, 0@h ori r3, r2, BAT_BL_256M | BAT_VALID_SUPERVISOR | BAT_VALID_USER - ori r2, r2, BAT_READ_WRITE + ori r2, r2, BAT_READ_WRITE | BAT_GUARDED mtdbatu 0, r3 mtdbatl 0, r2 isync - lis r2, BSP_IOREGION2@ha + lis r2, BSP_IOREGION2@h ori r3, r2, BAT_BL_64M | BAT_VALID_SUPERVISOR | BAT_VALID_USER ori r2, r2, BAT_CACHE_INHIBITED | BAT_GUARDED | BAT_READ_WRITE mtdbatu 1, r3 @@ -111,7 +112,7 @@ isync lis r2, BSP_IOREGION1@h - ori r3, r2, BSP_IOMASK1 + ori r3, r2, BAT_BL_256M | BAT_VALID_SUPERVISOR | BAT_VALID_USER ori r2, r2, BAT_CACHE_INHIBITED | BAT_GUARDED | BAT_READ_WRITE mtdbatu 2, r3 mtdbatl 2, r2 @@ -120,59 +121,59 @@ /* * IBATS * - * IBAT0 covers RAM (0 - 256Mb) - * IBAT1 covers ROM (_ROMBASE - _ROMBASE+16M) + * IBAT0 covers RAM (0 -> 256Mb) + * IBAT1 covers ROM (_ROMBASE -> _ROMBASE+ROM_SIZE) */ - lis r2, 0@ha + lis r2, 0@h ori r3, r2, BAT_BL_256M | BAT_VALID_SUPERVISOR | BAT_VALID_USER ori r2, r2, BAT_READ_WRITE mtibatu 0, r3 mtibatl 0, r2 isync - lis r2, _ROMBASE@ha + lis r2, _ROMBASE@h +#if ROM_SIZE > 1048576 ori r3, r2, BAT_BL_16M | BAT_VALID_SUPERVISOR | BAT_VALID_USER +#else + ori r3, r2, BAT_BL_1M | BAT_VALID_SUPERVISOR | BAT_VALID_USER +#endif ori r2, r2, BAT_READ_ONLY mtibatu 1, r3 mtibatl 1, r2 isync - /* - * Invalidate tlb entries - */ - lis r3, 0 - lis r5, 0x4 - isync -tlblp: - tlbie r3 - sync - addi r3, r3, 0x1000 - cmp 0, 0, r3, r5 - blt tlblp - - sync - /* * Enable MMU */ mfmsr r2 ori r2, r2, MSR_DR | MSR_IR - isync mtmsr r2 isync + sync /* - * Enable L1 dcache + * Enable and invalidate the L1 icache */ mfspr r2, HID0 - ori r2, r2, HID0_DCE | HID0_DCFI - sync + ori r2, r2, HID0_ICE | HID0_ICFI + isync mtspr HID0, r2 - /* - * Enable L1 icache + * Enable and invalidate the L1 dcache */ mfspr r2, HID0 - ori r2, r2, HID0_ICE | HID0_ICFI - isync + ori r2, r2, HID0_DCE | HID0_DCFI + sync mtspr HID0, r2 + + /* + * Initialize data cache blocks + * (assumes cache block size of 32 bytes) + */ + lis r1, DCACHE_RAM_BASE@h + ori r1, r1, DCACHE_RAM_BASE@l + li r3, (DCACHE_RAM_SIZE / 32) + mtctr r3 +0: dcbz r0, r1 + addi r1, r1, 32 + bdnz 0b |