75 lines
1.6 KiB
PHP
75 lines
1.6 KiB
PHP
// "kernel" constants:
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constant K_BASE(0x8000) // k0 is set to this.
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constant K_DUMP(0x0400) // we save registers and state here
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// when handling interrupts
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constant K_REASON(0x0600)
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constant K_CAUSE(0x0604)
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constant K_STATUS(0x0608)
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constant K_IN_ISR(0x060C)
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constant K_EPC(0x0610)
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constant K_ERRORPC(0x0614)
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constant K_BADVADDR(0x0618)
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constant K_HISTORY(0x061C)
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constant K_64DRIVE_MAGIC(0x0700)
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constant K_CI_BASE(0x0704)
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constant K_CONSOLE_AVAILABLE(0x0708)
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constant K_STACK(0x0C00 - 0x10)
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constant K_XXD(0x0C00) // size: 0x400 (any larger and you overwrite kernel code)
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// note this gets subtracted by 0x10 and the stack grows *backwards.*
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constant K_STACK_INIT_BASE(0x803F)
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// internal interrupt enum: (0 means no known interrupt/exception)
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constant K_INT_TLB_REFILL(1)
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constant K_INT_XTLB_REFILL(2)
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constant K_INT_CACHE_ERROR(3)
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constant K_INT_OTHER(4)
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macro _WriteString(name) {
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if K_DEBUG {
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// does not include error/console-checking!
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// note: this first instruction must be okay to be in a delay slot.
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la a2, {name}
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jal Drive64WriteDirect
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lli a3, {name}X - {name}
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}
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}
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macro WriteString(str) {
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if K_DEBUG {
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lui t0, K_BASE
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lw t1, K_CONSOLE_AVAILABLE(t0)
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beqz t1,+
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_WriteString({str})
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+
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}
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}
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macro KWriteString(str) {
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if K_DEBUG {
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lw t1, K_CONSOLE_AVAILABLE(k0)
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beqz t1,+
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_WriteString({str})
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+
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}
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}
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macro KS(name, str) {
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align(16)
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{name}:
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db {str}, 0
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align(16)
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{name}X:
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}
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macro KSL(name, str) {
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align(16)
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{name}:
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db {str}, 10, 0
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align(16)
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{name}X:
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}
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