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Line 1... |
;
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;
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; start.s -- ECO32 ROM monitor startup and support routines
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; start.s -- ECO32 ROM monitor startup and support routines
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;
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;
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.set CIO_CTL,0x00 ; set console to keyboard/display
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.set BIO_BASE,0xF1000000 ; board I/O base address
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; .set CIO_CTL,0x03 ; set console to serial line 0
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.set BIO_WR,BIO_BASE+0
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.set SPI_EN,0x80000000 ; SPI bus enable ctrl bit
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.set BIO_RD,BIO_BASE+4
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.set CIO_CTRL,0x08 ; this bit controls console I/O
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.set CIO_KBD_DSP,0x00 ; set console to keyboard/display
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.set CIO_SERIAL_0,0x03 ; set console to serial line 0
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.set dmapaddr,0xC0000000 ; base of directly mapped addresses
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.set dmapaddr,0xC0000000 ; base of directly mapped addresses
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.set stacktop,0xC0010000 ; monitor stack is at top of 64K
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.set stacktop,0xC0010000 ; monitor stack is at top of 64K
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.set PSW,0 ; reg # of PSW
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.set PSW,0 ; reg # of PSW
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Line 25... |
.set BAD_ADDRESS,4 ; reg # of bad address reg
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.set BAD_ADDRESS,4 ; reg # of bad address reg
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.set BAD_ACCESS,5 ; reg # of bad access reg
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.set BAD_ACCESS,5 ; reg # of bad access reg
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.set USER_CONTEXT_SIZE,38*4 ; size of user context
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.set USER_CONTEXT_SIZE,38*4 ; size of user context
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.set BIO_OUT,0xF1000000 ; board I/O output port
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.set SPI_EN,0x80000000 ; SPI bus enable ctrl bit
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;***************************************************************
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;***************************************************************
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.import _ecode
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.import _ecode
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.import _edata
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.import _edata
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.import _ebss
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.import _ebss
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Line 163... |
; let irq/exc vectors point to RAM
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; let irq/exc vectors point to RAM
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add $8,$0,V
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add $8,$0,V
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mvts $8,PSW
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mvts $8,PSW
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; disable flash ROM, enable SPI bus
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; disable flash ROM, enable SPI bus
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add $8,$0,BIO_OUT
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add $8,$0,BIO_WR
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add $9,$0,SPI_EN
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add $9,$0,SPI_EN
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stw $9,$8,0
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stw $9,$8,0
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; initialize TLB
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; initialize TLB
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mvts $0,TLB_ENTRY_LO ; invalidate all TLB entries
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mvts $0,TLB_ENTRY_LO ; invalidate all TLB entries
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Line 211... |
jal dspinit ; init display
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jal dspinit ; init display
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jal ser0init ; init serial line 0
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jal ser0init ; init serial line 0
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jal ser1init ; init serial line 1
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jal ser1init ; init serial line 1
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jal dskinitctl ; init disk (controller)
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jal dskinitctl ; init disk (controller)
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jal dskinitser ; init disk (serial line)
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jal dskinitser ; init disk (serial line)
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add $4,$0,CIO_CTL ; set console
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ldw $8,$0,BIO_RD ; get switch settings
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and $8,$8,CIO_CTRL
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add $4,$0,CIO_SERIAL_0 ; set console to serial line
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bne $8,$0,swtchset
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add $4,$0,CIO_KBD_DSP ; set console to kbd/dsp
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swtchset:
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jal setcio
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jal setcio
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; call main
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; call main
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jal main ; enter command loop
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jal main ; enter command loop
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