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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-07-09 17:08:48 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-07-09 17:08:48 +0000 |
| commit | b73e57bffe6cf60b1817bb2fc244a2f0c602bd5c (patch) | |
| tree | 410140b91a7df0566d9f6db8acf7d1a3aa5317cf /c/src/lib/libbsp/sparc/erc32/start/start.S | |
| parent | Make sure pthread init stack size is always set. (diff) | |
| download | rtems-b73e57bffe6cf60b1817bb2fc244a2f0c602bd5c.tar.bz2 | |
Patch from Jiri Gaisler <jgais@ws.estec.esa.nl>:
+ interrupt masking correction
+ FPU rev.B workaround
+ minor erc32 related fixes
Diffstat (limited to 'c/src/lib/libbsp/sparc/erc32/start/start.S')
| -rw-r--r-- | c/src/lib/libbsp/sparc/erc32/start/start.S | 44 |
1 files changed, 35 insertions, 9 deletions
diff --git a/c/src/lib/libbsp/sparc/erc32/start/start.S b/c/src/lib/libbsp/sparc/erc32/start/start.S index f9d4a8f293..4ccdbf0ac8 100644 --- a/c/src/lib/libbsp/sparc/erc32/start/start.S +++ b/c/src/lib/libbsp/sparc/erc32/start/start.S @@ -150,7 +150,8 @@ SYM(CLOCK_SPEED): * installed before. */ - SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 80 - 82 + TRAP( 0x80, SYM(syscall) ); ! 80 syscall SW trap + SOFT_TRAP; SOFT_TRAP; ! 81 - 82 TRAP( 0x83, SYM(window_flush_trap_handler) ); ! 83 flush windows SW trap SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 84 - 87 @@ -212,20 +213,44 @@ SYM(hard_reset): ld [%g3], %g2 set 0xfe080000, %g1 andcc %g1, %g2, %g0 - bne 1f - set 0x00101000, %g1 ! 2M ROM, 4M RAM - ! set the Memory Configuration - st %g1, [ %g3 + ERC32_MEC_MEMORY_CONFIGURATION_OFFSET ] - - set SYM(RAM_END), %sp ! End of work-space area - st %sp, [%g6] + bne 2f + + /* Set the correct memory size in MEC memory config register */ + + set SYM(PROM_SIZE), %l0 + set 0, %l1 + srl %l0, 18, %l0 +1: + tst %l0 + srl %l0, 1, %l0 + bne,a 1b + inc %l1 + sll %l1, 8, %l1 + + set SYM(RAM_SIZE), %l0 + srl %l0, 19, %l0 +1: + tst %l0 + srl %l0, 1, %l0 + bne,a 1b + inc %l1 + sll %l1, 10, %l1 + + ! set the Memory Configuration + st %l1, [ %g3 + ERC32_MEC_MEMORY_CONFIGURATION_OFFSET ] + + set SYM(RAM_START), %l1 ! Cannot use RAM_END due to bug in linker + set SYM(RAM_SIZE), %l2 + add %l1, %l2, %sp + st %sp, [%g6] + set SYM(CLOCK_SPEED), %g6 ! Use 14 MHz in simulator set 14, %g1 st %g1, [%g6] /* Common initialisation */ -1: +2: set WIM_INIT, %g1 ! Initialize WIM mov %g1, %wim @@ -298,6 +323,7 @@ zerobss: PUBLIC(BSP_fatal_return) SYM(BSP_fatal_return): + mov 1, %g1 ta 0 ! Halt if _main returns ... nop |