| Line 44... |
Line 44... |
#include "board.h"
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#include "board.h"
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* Coding conventions
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* Coding conventions
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*
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*
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* A simple rising stack is provided to starting at _stack and pointed to by
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v * A simple rising stack is provided to starting at _stack and pointed to by
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* r1. r1 points to the next free word. Only 32-bit registers may be pushed
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* r1. r1 points to the next free word. Only 32-bit registers may be pushed
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* onto the stack.
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* onto the stack.
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*
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*
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* Temporary labels up to 49 are reserved for macros and subroutines. Each is
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* Temporary labels up to 49 are reserved for macros and subroutines. Each is
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* used only once in any macro or subroutine. You can get in a serious mess if
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* used only once in any macro or subroutine. You can get in a serious mess if
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| Line 65... |
Line 65... |
* Memory controller constants
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* Memory controller constants
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* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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#define MEM_RAM 0x00000000
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#define MEM_RAM 0x00000000
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#define MC_CSR (0x00)
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#define MC_POC (0x04)
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#define MC_BA_MASK (0x08)
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#define MC_CSC(i) (0x10 + (i) * 8)
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#define MC_TMS(i) (0x14 + (i) * 8)
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* Floating point constants (IEEE 754)
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* Floating point constants (IEEE 754)
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*
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*
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* For the record, the single precision format has 1 sign bit, 8 exponent bits
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* For the record, the single precision format has 1 sign bit, 8 exponent bits
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* and 23 fraction bits.
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* and 23 fraction bits.
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| Line 354... |
Line 348... |
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* reset exception
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* reset exception
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* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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.section .except, "ax"
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.section .except, "ax"
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l.addi r1,r0,0
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.section .text
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.org 0x100
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.org 0x100
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_reset:
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_reset:
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l.movhi r1,hi(_stack) /* Set up the stack */
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l.movhi r1,hi(_stack) /* Set up the stack */
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l.ori r1,r1,lo(_stack)
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l.ori r1,r1,lo(_stack)
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l.movhi r3,hi(_init_mc) /* Code starts with MC setup */
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l.movhi r3,hi(start) /* Jump to test start */
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l.ori r3,r3,lo(_init_mc)
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l.ori r3,r3,lo(start)
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l.jr r3
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l.jr r3
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l.nop
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l.nop
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.org 0x700
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illegal_insn:
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l.nop
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.section .rodata ;\
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1: ;\
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.string "Illegal instruction. Enable hardware FPU.\n" ;\
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;\
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.section .except,"ax" ;\
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l.movhi r3,hi(1b) ;\
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l.ori r3,r3,lo(1b)
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l.jal _puts
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l.nop
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.section .rodata ;\
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1: ;\
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.string "Exiting.\n" ;\
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;\
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.section .except,"ax" ;\
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l.movhi r3,hi(1b) ;\
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l.ori r3,r3,lo(1b)
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l.jal _puts
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l.nop
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l.addi r3,r0,1
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l.nop NOP_EXIT
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.section .text
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* Subroutine to print out a string
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* Subroutine to print out a string
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*
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*
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* The string is followed by a newline
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* The string is followed by a newline
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*
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*
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| Line 490... |
Line 510... |
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POP (r9)
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POP (r9)
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l.jr r9
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l.jr r9
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* Memory controller initialization initialization
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* Start of tests
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* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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_init_mc:
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l.movhi r3,hi(MC_BASE_ADDR)
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l.ori r3,r3,lo(MC_BASE_ADDR)
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l.addi r4,r3,MC_CSC(0)
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start:
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l.movhi r5,hi(FLASH_BASE_ADDR)
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l.srai r5,r5,6
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l.ori r5,r5,0x0025
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l.sw 0(r4),r5
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l.addi r4,r3,MC_TMS(0)
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l.movhi r5,hi(FLASH_TMS_VAL)
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l.ori r5,r5,lo(FLASH_TMS_VAL)
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l.sw 0(r4),r5
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l.addi r4,r3,MC_BA_MASK
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l.addi r5,r0,MC_MASK_VAL
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l.sw 0(r4),r5
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l.addi r4,r3,MC_CSR
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l.movhi r5,hi(MC_CSR_VAL)
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l.ori r5,r5,lo(MC_CSR_VAL)
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l.sw 0(r4),r5
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l.addi r4,r3,MC_TMS(1)
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l.movhi r5,hi(SDRAM_TMS_VAL)
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l.ori r5,r5,lo(SDRAM_TMS_VAL)
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l.sw 0(r4),r5
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l.addi r4,r3,MC_CSC(1)
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l.movhi r5,hi(SDRAM_BASE_ADDR)
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l.srai r5,r5,6
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l.ori r5,r5,0x0411
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l.sw 0(r4),r5
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* Test of single precision add: lf.add.s
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* Test of single precision add: lf.add.s
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* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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.section .text
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_add_s:
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_add_s:
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LOAD_STR (r3, "lf.add.s\n")
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LOAD_STR (r3, "lf.add.s\n")
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l.jal _puts
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l.jal _puts
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l.nop
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l.nop
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