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Patch from Eric Valette <valette@crf.canon.fr> with debugging

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by Till Straumann <strauman@SLAC.Stanford.EDU>.  With this
patch, the motorola_shared BSP should also support the MVME2303.
This commit is contained in:
Joel Sherrill
2000-07-24 19:17:34 +00:00
parent 36f910cdbe
commit d7d1096c78
1 changed files with 15 additions and 7 deletions
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22
c/src/lib/libbsp/powerpc/shared/start/start.S
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@@ -78,17 +78,16 @@ __rtems_entry_point:
isync
/*
* we now have the 1st 64M of ram mapped with the bats.
* we now have the 1st 64M of ram mapped with the bats. We are still
* running on the bootloader stack and cannot switch to an RTEMS allocated
* init stack before copying the residual data that may have been set just after
* rtems_end address. This bug has been experienced on MVME2304. Thank to
* Till Straumann <strauman@SLAC.Stanford.EDU> for hunting it and suggesting
* the appropriate code.
*/
enter_C_code:
bl MMUon
/*
* stack = &__rtems_end + 4096
*/
addis r9,r0, __rtems_end+(4096-CPU_MINIMUM_STACK_FRAME_SIZE)@ha
addi r9,r9, __rtems_end+(4096-CPU_MINIMUM_STACK_FRAME_SIZE)@l
mr r1, r9
bl zero_bss
/*
* restore prep boot params
@@ -99,6 +98,15 @@ enter_C_code:
mr r6,r28
mr r7,r27
bl save_boot_params
/*
* stack = &__rtems_end + 4096
*/
addis r9,r0, __rtems_end+(4096-CPU_MINIMUM_STACK_FRAME_SIZE)@ha
addi r9,r9, __rtems_end+(4096-CPU_MINIMUM_STACK_FRAME_SIZE)@l
mr r1, r9
/*
* We are know in a environment that is totally independent from bootloader setup.
*/
bl boot_card
bl _return_to_ppcbug