| 195,7 → 195,7 |
|---|
| |
| li r29, 8 |
| mtctr r29 |
| li r30, 0 |
| li r30, 0 # ASID 0 (VSIDs 0 .. 7) |
| |
| seg_fill_uspace: |
| |
| 207,8 → 207,8 |
|---|
| |
| li r29, 8 |
| mtctr r29 |
| lis r30, 0x4000 |
| ori r30, r30, 8 |
| lis r30, 0x4000 # priviledged access only |
| ori r30, r30, 8 # ASID 0 (VSIDs 8 .. 15) |
| |
| seg_fill_kernel: |
| |
| 260,6 → 260,8 |
|---|
| |
| pht_clear: |
| |
| # write zeroes |
| |
| stw r29, 0(r31) |
| |
| addi r31, r31, 4 |
| 279,25 → 281,53 |
|---|
| |
| mtsdr1 r31 |
| |
| # create identity mapping |
| |
| #ifdef CONFIG_BAT |
| |
| # create BAT identity mapping |
| |
| DEBUG_mapping |
| |
| # FIXME: map exactly the size of RAM |
| lwz r31, 0(r3) |
| |
| lis r31, 0x8000 |
| ori r31, r31, 0x0ffe |
| lis r29, 0x0002 |
| cmpw r31, r29 |
| blt no_bat # less than 128 KB -> no BAT |
| |
| li r29, 18 |
| srw r31, r31, r29 # r31 = total >> 18 |
| |
| # create Block Length mask by replicating |
| # the leading logical one 14 times |
| |
| li r29, 14 |
| mtctr r31 |
| li r29, 1 |
| |
| bat_mask: |
| srw r30, r31, r29 # r30 = mask >> 1 |
| or r31, r31, r30 # mask = mask | r30 |
| |
| bdnz bat_mask |
| |
| andi. r31, r31, 0x07ff # mask = mask & 0x07ff (BAT can map up to 256 MB) |
| |
| li r29, 2 |
| slw r31, r31, r29 # mask = mask << 2 |
| ori r31, r31, 0x0002 # mask = mask | 0x0002 (priviledged access only) |
| |
| lis r29, 0x8000 |
| or r29, r29, r31 |
| |
| lis r30, 0x0000 |
| ori r30, r30, 0x0002 |
| |
| mtspr ibat0u, r31 |
| mtspr ibat0u, r29 |
| mtspr ibat0l, r30 |
| |
| mtspr dbat0u, r31 |
| mtspr dbat0u, r29 |
| mtspr dbat0l, r30 |
| |
| no_bat: |
| |
| #endif |
| |