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arcade: support for DDR3 direct loading.

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This commit is contained in:
sorgelig
2020-02-16 23:23:45 +08:00
parent b3b003b3dc
commit 80dcef4de7
1 changed files with 48 additions and 7 deletions
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55
support/arcade/romutils.cpp
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@@ -4,6 +4,7 @@
#include <sys/stat.h>
#include <dirent.h>
#include <ctype.h>
#include <sys/mman.h>
#include "../../sxmlc.h"
#include "../../user_io.h"
@@ -35,6 +36,7 @@ struct arc_struct {
int ifrom;
int ito;
int imap;
uint32_t address;
uint32_t crc;
buffer_data *data;
struct MD5Context context;
@@ -222,7 +224,34 @@ static int rom_patch(const uint8_t *buf, int offset, uint16_t len)
return 1;
}
static void rom_finish(int send)
static void send_to_ddr(uint32_t address, void* buf, uint32_t len)
{
int memfd = open("/dev/mem", O_RDWR | O_SYNC);
if (memfd == -1)
{
printf("Unable to open /dev/mem!\n");
return;
}
//make sure it's in FPGA address space
uint32_t map_addr = 0x20000000 | address;
void *base = mmap(0, len, PROT_READ | PROT_WRITE, MAP_SHARED, memfd, map_addr);
if (base == (void *)-1)
{
printf("Unable to mmap (0x%X, %d)!\n", map_addr, len);
close(memfd);
return;
}
memcpy(base, buf, len);
munmap(base, len);
close(memfd);
return;
}
static void rom_finish(int send, uint32_t address)
{
if (romlen[0] && romdata)
{
@@ -236,13 +265,20 @@ static void rom_finish(int send)
uint8_t *data = romdata;
int len = romlen[0];
while (romlen[0] > 0)
if (address)
{
uint16_t chunk = (romlen[0] > 4096) ? 4096 : romlen[0];
user_io_file_tx_write(data, chunk);
send_to_ddr(address, data, len);
}
else
{
while (romlen[0] > 0)
{
uint16_t chunk = (romlen[0] > 4096) ? 4096 : romlen[0];
user_io_file_tx_write(data, chunk);
romlen[0] -= chunk;
data += chunk;
romlen[0] -= chunk;
data += chunk;
}
}
// signal end of transmission
@@ -354,6 +390,7 @@ static int xml_send_rom(XMLEvent evt, const XMLNode* node, SXML_CHAR* text, cons
arc_info->ito = 0;
arc_info->imap = 0;
arc_info->zipname[0] = 0;
arc_info->address = 0;
MD5Init(&arc_info->context);
}
@@ -403,6 +440,10 @@ static int xml_send_rom(XMLEvent evt, const XMLNode* node, SXML_CHAR* text, cons
{
arc_info->romindex = atoi(node->attributes[i].value);
}
if (!strcasecmp(node->attributes[i].name, "address") && !strcasecmp(node->tag, "rom"))
{
arc_info->address = strtoul(node->attributes[i].value, NULL, 0);
}
if (!strcasecmp(node->attributes[i].name, "names") && !strcasecmp(node->tag, "buttons"))
{
@@ -638,7 +679,7 @@ static int xml_send_rom(XMLEvent evt, const XMLNode* node, SXML_CHAR* text, cons
}
}
rom_finish(checksumsame);
rom_finish(checksumsame, arc_info->address);
}
arc_info->insiderom = 0;
}