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[/] [mlite/] [trunk/] [tools/] [boot.asm] - Diff between revs 213 and 239

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Rev 213	Rev 239
Line 5...	Line 5...
`# FILENAME: boot.asm`	`# FILENAME: boot.asm`
`# PROJECT: Plasma CPU core`	`# PROJECT: Plasma CPU core`
`# COPYRIGHT: Software placed into the public domain by the author.`	`# COPYRIGHT: Software placed into the public domain by the author.`
`# Software 'as is' without warranty. Author liable for nothing.`	`# Software 'as is' without warranty. Author liable for nothing.`
`# DESCRIPTION:`	`# DESCRIPTION:`
`# Initializes the stack pointer and jumps to main2().`	`# Initializes the stack pointer and jumps to main().`
`##################################################################`	`##################################################################`
	`#Reserve 512 bytes for stack`
	`.comm InitStack, 512`

`.text`	`.text`
`.align 2`	`.align 2`
`.globl entry`	`.global entry`
`.ent entry`	`.ent entry`
`entry:`	`entry:`
`.set noreorder`	`.set noreorder`

`#These eight instructions should be the first instructions.`	`#These four instructions should be the first instructions.`
`#convert.exe previously initialized $gp, .sbss_start, .bss_end, $sp`	`#convert.exe previously initialized $gp, .sbss_start, .bss_end, $sp`
`la $gp, _gp #initialize stack pointer`	`la $gp, _gp #initialize global pointer`
`la $4, __bss_start #$4 = .sbss_start`	`la $5, __bss_start #$5 = .sbss_start`
`la $2, _end #$2 = .bss_end`	`la $4, _end #$2 = .bss_end`
`la $sp, InitStack+488 #initialize stack pointer`	`la $sp, InitStack+488 #initialize stack pointer`

`$BSS_CLEAR:`	`$BSS_CLEAR:`
`sw $0, 0($4)`	`sw $0, 0($5)`
`slt $3, $4, $2`	`slt $3, $5, $4`
`bnez $3, $BSS_CLEAR`	`bnez $3, $BSS_CLEAR`
`addiu $4, $4, 4`	`addiu $5, $5, 4`

`jal main`	`jal main`
`nop`	`nop`
`$L1:`	`$L1:`
`j $L1`	`j $L1`
Line 37...	Line 40...
`.end entry`	`.end entry`


`###################################################`	`###################################################`
`#address 0x3c`	`#address 0x3c`
`.globl interrupt_service_routine`	`.global interrupt_service_routine`
`.ent interrupt_service_routine`	`.ent interrupt_service_routine`
`interrupt_service_routine:`	`interrupt_service_routine:`
`.set noreorder`	`.set noreorder`
`.set noat`	`.set noat`

Line 116...	Line 119...
`.end interrupt_service_routine`	`.end interrupt_service_routine`
`.set at`	`.set at`


`###################################################`	`###################################################`
`.globl OS_AsmInterruptEnable`	`.global OS_AsmInterruptEnable`
`.ent OS_AsmInterruptEnable`	`.ent OS_AsmInterruptEnable`
`OS_AsmInterruptEnable:`	`OS_AsmInterruptEnable:`
`.set noreorder`	`.set noreorder`
`mfc0 $2, $12`	`mfc0 $2, $12`
`jr $31`	`jr $31`
Line 129...	Line 132...
`.set reorder`	`.set reorder`
`.end OS_AsmInterruptEnable`	`.end OS_AsmInterruptEnable`


`###################################################`	`###################################################`
`.globl OS_AsmInterruptInit`	`.global OS_AsmInterruptInit`
`.ent OS_AsmInterruptInit`	`.ent OS_AsmInterruptInit`
`OS_AsmInterruptInit:`	`OS_AsmInterruptInit:`
`.set noreorder`	`.set noreorder`
`#Patch interrupt vector to 0x1000003c`	`#Patch interrupt vector to 0x1000003c`
`la $5, OS_AsmPatchValue`	`la $5, OS_AsmPatchValue`
Line 158...	Line 161...
`.set reorder`	`.set reorder`
`.end OS_AsmInterruptInit`	`.end OS_AsmInterruptInit`


`###################################################`	`###################################################`
`.globl setjmp`	`.global setjmp`
`.ent setjmp`	`.ent setjmp`
`setjmp:`	`setjmp:`
`.set noreorder`	`.set noreorder`
`sw $16, 0($4) #s0`	`sw $16, 0($4) #s0`
`sw $17, 4($4) #s1`	`sw $17, 4($4) #s1`
Line 182...	Line 185...
`.set reorder`	`.set reorder`
`.end setjmp`	`.end setjmp`


`###################################################`	`###################################################`
`.globl longjmp`	`.global longjmp`
`.ent longjmp`	`.ent longjmp`
`longjmp:`	`longjmp:`
`.set noreorder`	`.set noreorder`
`lw $16, 0($4) #s0`	`lw $16, 0($4) #s0`
`lw $17, 4($4) #s1`	`lw $17, 4($4) #s1`
Line 206...	Line 209...
`.set reorder`	`.set reorder`
`.end longjmp`	`.end longjmp`


`###################################################`	`###################################################`
`.globl OS_AsmMult`	`.global OS_AsmMult`
`.ent OS_AsmMult`	`.ent OS_AsmMult`
`OS_AsmMult:`	`OS_AsmMult:`
`.set noreorder`	`.set noreorder`
`multu $4, $5`	`multu $4, $5`
`mflo $2`	`mflo $2`
Line 221...	Line 224...
`.set reorder`	`.set reorder`
`.end OS_AsmMult`	`.end OS_AsmMult`


`###################################################`	`###################################################`
`.globl OS_Syscall`	`.global OS_Syscall`
`.ent OS_Syscall`	`.ent OS_Syscall`
`OS_Syscall:`	`OS_Syscall:`
`.set noreorder`	`.set noreorder`
`syscall 0`	`syscall 0`
`jr $31`	`jr $31`

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[/] [mlite/] [trunk/] [tools/] [boot.asm] - Diff between revs 213 and 239