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Rev 3890 Rev 3922
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#include <arch/asm/regname.h>
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#include <arch/asm/regname.h>
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#include <arch/mm/page.h>
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#include <arch/mm/page.h>
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#include <arch/asm/boot.h>
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#include <arch/asm/boot.h>
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#include <arch/context_offset.h>
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#include <arch/context_offset.h>
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#include <arch/stack.h>
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#include <arch/stack.h>
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.text
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.text
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.set noat
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.set noat
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.set noreorder
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.set noreorder
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.set nomacro
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.set nomacro
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	# Move $k0 pointer to kernel stack
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	# Move $k0 pointer to kernel stack
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	lui $k0, %hi(supervisor_sp)
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	lui $k0, %hi(supervisor_sp)
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	ori $k0, $k0, %lo(supervisor_sp)
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	ori $k0, $k0, %lo(supervisor_sp)
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	# Move $k0 (superveisor_sp)
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	# Move $k0 (superveisor_sp)
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	lw $k0, 0($k0)
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	lw $k0, 0($k0)
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1:
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1:
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.endm
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.endm
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.org 0x0
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.org 0x0
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kernel_image_start:
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kernel_image_start:
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	/* Load temporary stack */
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	/* Load temporary stack */
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	lui $sp, %hi(end_stack)
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	lui $sp, %hi(end_stack)
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	ori $sp, $sp, %lo(end_stack)
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	ori $sp, $sp, %lo(end_stack)
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	/* $a1 contains physical address of bootinfo_t */
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	/* $a2 contains size of bootinfo_t */
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	/* Not sure about this, but might
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- 
 
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	beq $a2, $0, bootinfo_end
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- 
 
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	/* Not sure about this, but might be needed for PIC code???? */
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	   be needed for PIC code */
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	lui $gp, 0x8000
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	lui $gp, 0x8000
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	lui $a3, %hi(bootinfo)
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	ori $a3, $a3, %lo(bootinfo)
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	/* $a1 contains physical address of bootinfo_t */
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- 
 
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	bootinfo_loop:
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		lw $v0, 0($a1)
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		sw $v0, 0($a3)
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		addi $a1, $a1, 4
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		addi $a3, $a3, 4
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		addi $a2, $a2, -4
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		bgtz $a2, bootinfo_loop
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		nop
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	bootinfo_end:
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	jal arch_pre_main
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	jal arch_pre_main
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	nop
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	nop
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	j main_bsp
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	j main_bsp
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	j cache_error_handler
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	j cache_error_handler
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	nop
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	nop
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exception_entry:
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exception_entry:
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	j exception_handler
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	j exception_handler
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	nop
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	nop
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exception_handler:
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exception_handler:
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	KERNEL_STACK_TO_K0
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	KERNEL_STACK_TO_K0
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	sub $k0, REGISTER_SPACE
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	sub $k0, REGISTER_SPACE
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	sw $sp, EOFFSET_SP($k0)
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	sw $sp, EOFFSET_SP($k0)
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	move $sp, $k0
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	move $sp, $k0
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	mfc0 $k0, $cause
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	mfc0 $k0, $cause
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	sra $k0, $k0, 0x2		# cp0_exc_cause() part 1
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	sra $k0, $k0, 0x2    # cp0_exc_cause() part 1
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	andi $k0, $k0, 0x1f		# cp0_exc_cause() part 2
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	andi $k0, $k0, 0x1f  # cp0_exc_cause() part 2
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	sub $k0, 8			# 8 = SYSCALL
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	sub $k0, 8           # 8 = SYSCALL
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	beqz $k0, syscall_shortcut
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	beqz $k0, syscall_shortcut
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	add $k0, 8			# Revert $k0 back to correct exc number
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	add $k0, 8           # Revert $k0 back to correct exc number
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	REGISTERS_STORE_AND_EXC_RESET $sp
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	REGISTERS_STORE_AND_EXC_RESET $sp
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	move $a1, $sp
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	move $a1, $sp
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	jal exc_dispatch		# exc_dispatch(excno, register_space)
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	jal exc_dispatch     # exc_dispatch(excno, register_space)
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	move $a0, $k0
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	move $a0, $k0
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	REGISTERS_LOAD $sp
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	REGISTERS_LOAD $sp
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	# The $sp is automatically restored to former value
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	# The $sp is automatically restored to former value
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	eret
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	eret