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avoid using k0 in boot, fix double newline

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This commit is contained in:
Connor Olding 2018-08-18 19:41:30 +02:00
parent f0c23c6c3a
commit 1bf6a13bd4
1 changed files with 21 additions and 14 deletions
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35
kernel.asm
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@ -17,8 +17,14 @@ macro KMaybeDumpString(str) {
}
macro KString(name, str) {
// appends trailing newline and null-terminator.
// must be shorter than 0x10000 after padding.
align(16)
{name}:
db {str}, 0
align(16)
{name}X:
}
macro KStringLine(name, str) {
align(16)
{name}:
db {str}, 10, 0
@ -28,7 +34,7 @@ macro KString(name, str) {
Start:
mtc0 r0, CP0_Cause // clear cause
lui k0, K_BASE
lui gp, K_BASE
// copy our interrupt handlers into place.
lui t0, 0x8000
@ -78,10 +84,10 @@ Start:
// TODO: just wipe a portion of RAM?
// or just DMA in the IH and our defaults from ROM...
sw r0, K_64DRIVE_MAGIC(k0)
sw r0, K_REASON(k0)
sw r0, K_IN_MAIN(k0)
sw r0, K_CONSOLE_AVAILABLE(k0)
sw r0, K_64DRIVE_MAGIC(gp)
sw r0, K_REASON(gp)
sw r0, K_IN_MAIN(gp)
sw r0, K_CONSOLE_AVAILABLE(gp)
Drive64Init:
lui t9, CI_BASE
@ -99,8 +105,8 @@ Drive64TryExtended:
nop
Drive64Confirmed:
sw t2, K_64DRIVE_MAGIC(k0)
sw t9, K_CI_BASE(k0)
sw t2, K_64DRIVE_MAGIC(gp)
sw t9, K_CI_BASE(gp)
// enable writing to cartROM (SDRAM) for USB writing later
lli t1, 0xF0
@ -112,10 +118,9 @@ Drive64CheckConsole:
// NOTE: we only check at boot, so disconnecting the console
// while running will cause a ton of lag (timeouts) until reset.
KDumpString(KConsoleConfirmed)
lui k0, K_BASE // we need to reload this if dumping threw an interrupt
lli t0, 1
beqzl v0, Drive64Done
sw t0, K_CONSOLE_AVAILABLE(k0)
sw t0, K_CONSOLE_AVAILABLE(gp)
Drive64Done:
@ -327,6 +332,8 @@ IHMain: // free to modify any GPR from here to IHExit
jal DumpAndWrite
lli a3, 0x80 * 4
KMaybeDumpString(KNewline)
IHExit:
sw r0, K_IN_MAIN(k0)
@ -398,10 +405,10 @@ ReturnFromInterrupt:
include "debug.asm"
KString(KString0, " ~~ Interrupt Handled ~~")
KString(KString1, " Interrupt States:")
KString(KNewline, 10)
KString(KConsoleConfirmed, "USB debug console detected")
KStringLine(KConsoleConfirmed, "USB debug console detected")
KStringLine(KString0, " ~~ Interrupt Handled ~~")
KStringLine(KString1, " Interrupt States:")
align(4)
nops((K_BASE << 16) + 0x10000)