common.c

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/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Copyright (c) 2003  Marcus R. Brown <mrbrown@0xd6.org>
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#include <kernel.h>
#include <sifrpc.h>
 
#include "slib.h"
#include "smod.h"
 
#include "common.h"
 
struct smem_buf smem_buf ALIGNED(64);
 
/* Do not link to memcmp() from libc, so we only depend on libkernel. */
int __memcmp(const void *s1, const void *s2, unsigned int length)
{
        const char *a = s1;
        const char *b = s2;
 
        while (length--) {
                if (*a++ != *b++)
                        return 1;
        }
 
        return 0;
}
 
int smem_write_word(void *address, u32 value)
{
        SifRpcReceiveData_t RData;
        void *pDestRounded;
        int result;
        SifDmaTransfer_t dmat;
 
        pDestRounded=(void*)(((u32)address)&0xFFFFFFC0);
        SyncDCache(&smem_buf, smem_buf.bytes+64);
        if((result=SifRpcGetOtherData(&RData, pDestRounded, &smem_buf, 64, 0))>=0)
        {
                *(u32*)UNCACHED_SEG((&smem_buf.bytes[((u32)address&0x3F)]))=value;
 
                dmat.src=&smem_buf;
                dmat.dest=pDestRounded;
                dmat.size=64;
                dmat.attr=0;
                SifSetDma(&dmat, 1);
        }
 
        return result;
}