alarm.c

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/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/

 
#include <kernel.h>
#include <timer.h>
#include <stdio.h>
 
struct SyscallData
{
    int syscall;
    void *function;
};
 
static const struct SyscallData SysEntry[] = {
    {0x5A, &kCopy},
    {0x5B, (void *)0x80076000},
    {0xFC, NULL},  // SetAlarm
    {0xFD, NULL},  // iSetAlarm
    {0xFE, NULL},  // ReleaseAlarm
    {0xFF, NULL},  // iReleaseAlarm
    {0x12C, NULL}, // Intc12Handler (overwrites INTC 12 handler entry)
    {0x08, NULL},  // ResumeIntrDispatch (Syscall #8)
};
 
extern unsigned char srcfile[];
extern unsigned int size_srcfile;
 
extern unsigned char eenull[];
extern unsigned int size_eenull;
 
__attribute__((weak))
void InitAlarm(void)
{
    // Only apply the kernel patch if T3 has not already started
    if (((*T3_MODE) & 0x100) == 0)
    {
        int i;
 
        setup(SysEntry[0].syscall, SysEntry[0].function);
        Copy((void *)0x80076000, srcfile, size_srcfile);
        Copy((void *)0x00082000, eenull, size_eenull);
        FlushCache(0);
        FlushCache(2);
        setup(SysEntry[1].syscall, SysEntry[1].function);
 
        for (i = 2; i < 8; i++)
        {
            setup(SysEntry[i].syscall, GetEntryAddress(SysEntry[i].syscall));
        }
    }
}