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Remove and note N64 digital

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(it was not yet used)
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Robin Jones 2023-03-01 02:47:08 +00:00
parent 91a6ae7a33
commit 3d77e24e58
3 changed files with 2 additions and 130 deletions
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2
README.md
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@ -6,6 +6,8 @@
* Be open source using preferably MIT licensed third party licensed libraries where possible.
* Be testable, where possible using CTest, but if not, in an emulated environment.
* Encourage active development from community members and N64 FlashCart owners.
* Support [PixelFX N64Digital](https://gitlab.com/pixelfx-public/n64-game-id)
## Basic usage

110
src/libs/pixelfx_n64digital/pfxromid.c
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/*
Based on libdragon
This implementation does not disable interrupts during PIF operation!
*/
#include <stdint.h>
#include <string.h>
#include "pfxromid.h"
#include "libdragon.h"
#define SI_STATUS_DMA_BUSY (1 << 0)
#define SI_STATUS_IO_BUSY (1 << 1)
#define MEMORY_BARRIER() asm volatile ("" : : : "memory")
#define cache_op(op, linesize) ({ \
if (length) { \
void *cur = (void*)((unsigned long)addr & ~(linesize-1)); \
int count = (int)length + (addr-cur); \
for (int i = 0; i < count; i += linesize) \
asm ("\tcache %0,(%1)\n"::"i" (op), "r" (cur+i)); \
} \
})
#define UncachedAddr(_addr) ((void *)(((unsigned long)(_addr))|0x20000000))
typedef struct SI_regs_s {
volatile void * DRAM_addr;
volatile void * PIF_addr_read;
uint32_t reserved1;
uint32_t reserved2;
volatile void * PIF_addr_write;
uint32_t reserved3;
uint32_t status;
} SI_regs_t;
static volatile struct SI_regs_s * const SI_regs = (struct SI_regs_s *)0xa4800000;
static void * const PIF_RAM = (void *)0x1fc007c0;
// Uses the libdragon header function!!!
// static void data_cache_hit_writeback_invalidate(volatile void * addr, unsigned long length)
// {
// cache_op(0x15, 16);
// }
static void __SI_DMA_wait(void)
{
while (SI_regs->status & (SI_STATUS_DMA_BUSY | SI_STATUS_IO_BUSY));
}
static void __controller_exec_PIF(void *inblock) { //TODO: this is (nearly) the same as the RTC code (duplicate) use generic function or just libdragon?!)
volatile uint64_t inblock_temp[8];
volatile uint64_t outblock_temp[8];
data_cache_hit_writeback_invalidate(inblock_temp, 64);
memcpy(UncachedAddr(inblock_temp), inblock, 64);
/* Be sure another thread doesn't get into a resource fight */
disable_interrupts();
__SI_DMA_wait();
SI_regs->DRAM_addr = inblock_temp; // only cares about 23:0
MEMORY_BARRIER();
SI_regs->PIF_addr_write = PIF_RAM; // is it really ever anything else?
MEMORY_BARRIER();
__SI_DMA_wait();
data_cache_hit_writeback_invalidate(outblock_temp, 64);
SI_regs->DRAM_addr = outblock_temp;
MEMORY_BARRIER();
SI_regs->PIF_addr_read = PIF_RAM;
MEMORY_BARRIER();
__SI_DMA_wait();
/* Now that we've copied, its safe to let other threads go */
enable_interrupts();
}
static void send_raw_command(int controller, int command, int bytesout, unsigned char *out)
{
unsigned long long SI_read_controllers_block[8] = { 0, 0, 0, 0, 0, 0, 0, 1 };
uint8_t *data = (uint8_t *)SI_read_controllers_block;
data[controller + 0] = bytesout + 1;
data[controller + 1] = 1;
data[controller + 2] = command;
memcpy( &data[controller + 3], out, bytesout );
data[controller + 3 + bytesout] = 0xFE;
data[controller + 3 + bytesout + 1] = 0xFF;
__controller_exec_PIF(SI_read_controllers_block);
}
void pfx_send_game_id(uint8_t* crc_hi, uint8_t* crc_lo, uint8_t media_format, uint8_t country_id)
{
uint8_t out[10];
memcpy(out, crc_hi, 4);
memcpy(&out[4], crc_lo, 4);
out[8] = media_format;
out[9] = country_id;
send_raw_command(0, 0x1D, sizeof(out), out);
}

20
src/libs/pixelfx_n64digital/pfxromid.h
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/*
** Copyright 2021 JonesAlmighty & PixelFx
*/
#ifndef __PIXELFX_ROMID_H
#define __PIXELFX_ROMID_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
void pfx_send_game_id(uint8_t* crc_hi, uint8_t* crc_lo, uint8_t media_format, uint8_t country_id);
#ifdef __cplusplus
}
#endif
#endif