4.104.114.84.95
Last change
on this file since 603f30f was
603f30f,
checked in by Joel Sherrill <joel.sherrill@…>, on 11/15/00 at 18:14:06
|
2000-11-14 Jiri Gaisler <jgais@…>
- startup/boardinit.S: St 32-bit ram width by default.
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-
Property mode set to
100644
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File size:
1.5 KB
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Rev | Line | |
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[b21b0ab] | 1 | /* |
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| 2 | * boardinit.s |
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| 3 | * |
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| 4 | * Start code for the LEON. |
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| 5 | * |
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| 6 | * $Id$ |
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| 7 | */ |
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| 8 | |
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| 9 | #include <asm.h> |
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| 10 | #include <leon.h> |
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| 11 | |
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| 12 | .global __bsp_board_init |
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| 13 | |
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| 14 | __bsp_board_init: |
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| 15 | |
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| 16 | /* Check if LEON is initialised. If not, this means that we are |
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| 17 | running on the simulator. Initiate some of the parameters |
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| 18 | that are done by the boot-prom otherwise. |
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| 19 | */ |
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| 20 | |
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| 21 | set SYM(LEON_REG), %l0 ! %l0 = base address of peripherals |
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| 22 | ld [%l0+LEON_REG_CACHECTRL_OFFSET], %l1 ! Check if LEON has been initialised |
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| 23 | andcc %l1, 3, %g0 |
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| 24 | bne 2f |
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| 25 | nop |
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| 26 | |
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| 27 | |
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| 28 | flush |
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| 29 | set 0x1000f, %l1 |
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| 30 | st %l1, [%l0 + LEON_REG_CACHECTRL_OFFSET] ! enable caches |
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| 31 | ld [%l0 + LEON_REG_SIM_ROM_SIZE_OFFSET], %g1 ! load simulator rom size |
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| 32 | clr %l2 |
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| 33 | srl %g1, 13, %g1 ! calculate appropriate rom size |
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| 34 | 1: |
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| 35 | srl %g1, 1, %g1 |
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| 36 | tst %g1 |
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| 37 | bne,a 1b |
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| 38 | inc %l2 |
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| 39 | sll %l2, 14, %l2 |
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| 40 | st %l2, [%l0 + LEON_REG_MEMCFG1_OFFSET] ! set prom size in memcfg1 |
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| 41 | |
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| 42 | set 0, %l2 |
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| 43 | ld [%l0 + LEON_REG_SIM_RAM_SIZE_OFFSET], %g2 ! load simulator ram size |
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| 44 | srl %g2, 13, %g1 ! calculate appropriate ram size |
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| 45 | 1: |
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| 46 | srl %g1, 1, %g1 |
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| 47 | tst %g1 |
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| 48 | bne,a 1b |
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| 49 | inc %l2 |
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| 50 | sll %l2, 9, %l2 |
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[603f30f] | 51 | or %l2, 0x20, %l2 ! set 32-bit ram width by default |
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[b21b0ab] | 52 | st %l2, [%l0 + LEON_REG_MEMCFG2_OFFSET] ! set ram size in memcfg2 |
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| 53 | |
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| 54 | set SYM(RAM_START), %l1 ! Cannot use RAM_END due to bug in linker |
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| 55 | set SYM(RAM_SIZE), %l2 |
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| 56 | add %l1, %l2, %sp |
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| 57 | set 49, %l2 |
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| 58 | st %l2, [%l0 + LEON_REG_SCALER_LOAD_OFFSET] ! scaler reload register |
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| 59 | st %l2, [%l0 + LEON_REG_SCALERCNT_OFFSET] ! scaler counter register |
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| 60 | |
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| 61 | 2: |
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| 62 | retl |
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| 63 | nop |
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| 64 | |
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| 65 | /* end of file */ |
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