mirror of
https://github.com/fail0verflow/mini.git
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133 lines
3.0 KiB
C
133 lines
3.0 KiB
C
/*
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mini - a Free Software replacement for the Nintendo/BroadOn IOS.
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IRQ support
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Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, version 2.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "irq.h"
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#include "hollywood.h"
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#include "gecko.h"
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#include "utils.h"
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#include "ipc.h"
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#include "crypto.h"
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#include "nand.h"
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#include "sdhcvar.h"
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static u32 _alarm_frequency = 0;
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void irq_setup_stack(void);
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void irq_initialize(void)
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{
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irq_setup_stack();
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write32(HW_ARMIRQMASK, 0);
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write32(HW_ARMIRQFLAG, 0xffffffff);
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irq_restore(CPSR_FIQDIS);
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//???
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write32(HW_ARMIRQMASK+0x04, 0);
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write32(HW_ARMIRQMASK+0x20, 0);
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write32(HW_ALARM, 0);
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}
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void irq_shutdown(void)
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{
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write32(HW_ARMIRQMASK, 0);
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write32(HW_ARMIRQFLAG, 0xffffffff);
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irq_kill();
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}
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void irq_handler(void)
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{
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u32 enabled = read32(HW_ARMIRQMASK);
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u32 flags = read32(HW_ARMIRQFLAG);
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//gecko_printf("In IRQ handler: 0x%08x 0x%08x 0x%08x\n", enabled, flags, flags & enabled);
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flags = flags & enabled;
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if(flags & IRQF_TIMER) {
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if (_alarm_frequency) {
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// currently we use the alarm timer only for lame usbgecko polling
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gecko_timer();
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write32(HW_ALARM, read32(HW_TIMER) + _alarm_frequency);
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}
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write32(HW_ARMIRQFLAG, IRQF_TIMER);
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}
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if(flags & IRQF_NAND) {
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// gecko_printf("IRQ: NAND\n");
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write32(NAND_CMD, 0x7fffffff); // shut it up
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write32(HW_ARMIRQFLAG, IRQF_NAND);
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nand_irq();
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}
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if(flags & IRQF_GPIO1B) {
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gecko_printf("IRQ: GPIO1B\n");
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write32(HW_GPIO1BINTFLAG, 0xFFFFFF); // shut it up
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write32(HW_ARMIRQFLAG, IRQF_GPIO1B);
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}
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if(flags & IRQF_GPIO1) {
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gecko_printf("IRQ: GPIO1\n");
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write32(HW_GPIO1INTFLAG, 0xFFFFFF); // shut it up
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write32(HW_ARMIRQFLAG, IRQF_GPIO1);
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}
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if(flags & IRQF_RESET) {
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gecko_printf("IRQ: RESET\n");
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write32(HW_ARMIRQFLAG, IRQF_RESET);
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}
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if(flags & IRQF_IPC) {
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//gecko_printf("IRQ: IPC\n");
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ipc_irq();
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write32(HW_ARMIRQFLAG, IRQF_IPC);
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}
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if(flags & IRQF_AES) {
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gecko_printf("IRQ: AES\n");
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write32(HW_ARMIRQFLAG, IRQF_AES);
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}
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if (flags & IRQF_SDHC) {
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// gecko_printf("IRQ: SDHC\n");
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write32(HW_ARMIRQFLAG, IRQF_SDHC);
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sdhc_irq();
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}
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flags &= ~IRQF_ALL;
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if(flags) {
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gecko_printf("IRQ: unknown 0x%08x\n", flags);
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write32(HW_ARMIRQFLAG, flags);
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}
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}
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void irq_enable(u32 irq)
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{
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set32(HW_ARMIRQMASK, 1<<irq);
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}
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void irq_disable(u32 irq)
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{
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clear32(HW_ARMIRQMASK, 1<<irq);
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}
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void irq_set_alarm(u32 ms, u8 enable)
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{
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_alarm_frequency = IRQ_ALARM_MS2REG(ms);
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if (enable)
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write32(HW_ALARM, read32(HW_TIMER) + _alarm_frequency);
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}
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