diff options
Diffstat (limited to 'src/bootloader')
| -rw-r--r-- | src/bootloader/bl_start.S | 49 |
1 files changed, 37 insertions, 12 deletions
diff --git a/src/bootloader/bl_start.S b/src/bootloader/bl_start.S index 9af07a45f..a4cb577c0 100644 --- a/src/bootloader/bl_start.S +++ b/src/bootloader/bl_start.S @@ -25,6 +25,12 @@ .include "kernel/ppcconsts.S" +.set SBE_HB_VERSION, sbe_hb_structures ;// uint32_t +.set SBE_HB_SBEBOOTSIDE, sbe_hb_structures+4 ;// uint8_t +.set SBE_HB_PNORBOOTSIDE, sbe_hb_structures+5 ;// uint8_t +.set SBE_HB_PNORSIZEMB, sbe_hb_structures+6 ;// uint16_t +.set SBE_HB_BLLOADSIZE, sbe_hb_structures+8 ;// uint64_t + .section .text.bootloaderasm .global _start @@ -70,18 +76,37 @@ _main: lis r1, _start@h addis r1, r1, 1 ;// 64k (1 * 0x10000) - ;// Zero space from end of load to bottom of stack - lis r3, end_load_address@h - ori r3, r3, end_load_address@l - li r4, 7 - add r3, r3, r4 - andc r3, r3, r4 - li r4, 0 -_zero_space_loop: - std r4, 0(r3) - addi r3, r3, 8 - cmpld cr7, r3, r1 - blt cr7, _zero_space_loop + ;// Do dcbz from end of Bootloader load to end of HBB ECC working space +_dcbz_after_bl: + lis r5, SBE_HB_BLLOADSIZE@h + ori r5, r5, SBE_HB_BLLOADSIZE@l + ld r5, 0(r5) ;// get ending EA from SBE HB structure + lis r6, 0 + addis r6, r6, 32 ;// 2M (32 * 0x10000) + addi r6, r6, -1 ;// end before 2M +_dcbz_after_bl_loop: + dcbz 0,r5 + addi r5, r5, 128 + cmpld cr7, r5, r6 + blt cr7, _dcbz_after_bl_loop + + ;// Do dcbz from start of HBB running space to start of Bootloader load +_dcbz_before_bl: + li r7, 1 + rotldi r7, r7, 63 ;// set bit mask for ignoring HRMOR + + lis r5, 0 + addis r5, r5, 2048 ;// 128M (2048 * 0x10000) is start of HBB + or r5, r5, r7 ;// ignore HRMOR + + mfspr r6, HRMOR ;// use HRMOR as start of Bootloader + addi r6, r6, -1 ;// end before Bootloader + or r6, r6, r7 ;// ignore HRMOR +_dcbz_before_bl_loop: + dcbz 0,r5 + addi r5, r5, 128 + cmpld cr7, r5, r6 + blt cr7, _dcbz_before_bl_loop ;// Call main. bl main |
