391 lines
12 KiB
C++
391 lines
12 KiB
C++
#include "memorymap.hpp"
|
|
#include "sh7091/sh7091.hpp"
|
|
#include "sh7091/sh7091_bits.hpp"
|
|
#include "sh7091/serial.hpp"
|
|
#include "systembus.hpp"
|
|
#include "systembus_bits.hpp"
|
|
|
|
#include "aica/aica.hpp"
|
|
|
|
#include "gdrom/gdrom.hpp"
|
|
#include "gdrom/gdrom_bits.hpp"
|
|
#include "gdrom/command_packet_format.hpp"
|
|
#include "gdrom/toc.hpp"
|
|
|
|
#include "iso9660/primary_volume_descriptor.hpp"
|
|
#include "iso9660/directory_record.hpp"
|
|
|
|
extern void * _binary_start __asm("_binary_example_arm_sh4_interrupt_bin_start");
|
|
extern void * _binary_size __asm("_binary_example_arm_sh4_interrupt_bin_size");
|
|
|
|
constexpr uint32_t mcipd__sh4_interrupt = (1 << 5);
|
|
constexpr uint32_t miceb__sh4_interrupt = (1 << 5);
|
|
constexpr uint32_t scipd__arm_interrupt = (1 << 5);
|
|
|
|
constexpr uint32_t sectors_per_chunk = 16;
|
|
constexpr uint32_t chunk_size = 2048 * sectors_per_chunk;
|
|
|
|
void aica_wait_write()
|
|
{
|
|
while (ffst::aica_internal_write_buffer(system.FFST));
|
|
}
|
|
|
|
void aica_wait_read()
|
|
{
|
|
uint32_t ffst = system.FFST;
|
|
while ( ffst::holly_cpu_if_block_internal_write_buffer(ffst)
|
|
| ffst::holly_g2_if_block_internal_write_buffer(ffst)
|
|
| ffst::aica_internal_write_buffer(ffst)) {
|
|
ffst = system.FFST;
|
|
};
|
|
}
|
|
|
|
void aica_fill_chunk(volatile uint32_t * dest_chunk, const uint32_t * src_chunk, const uint32_t size)
|
|
{
|
|
for (uint32_t i = 0; i < size / 4; i++) {
|
|
if (i % 8 == 0) aica_wait_write();
|
|
dest_chunk[i] = src_chunk[i];
|
|
}
|
|
}
|
|
|
|
static volatile uint32_t (* chunk)[2][chunk_size / 4];
|
|
|
|
void aica_init(uint32_t& chunk_index, const uint32_t * src_chunk)
|
|
{
|
|
const uint32_t * binary = reinterpret_cast<uint32_t *>(&_binary_start);
|
|
const uint32_t binary_size = reinterpret_cast<uint32_t>(&_binary_size);
|
|
|
|
aica_wait_write(); aica_sound.common.vreg_armrst = aica::vreg_armrst::ARMRST(1);
|
|
aica_wait_write(); aica_sound.common.dmea0_mrwinh = aica::dmea0_mrwinh::MRWINH(0);
|
|
for (uint32_t i = 0; i < binary_size / 4; i++) {
|
|
// copy
|
|
while (aica_wave_memory[i] != binary[i]) {
|
|
aica_wait_write();
|
|
aica_wave_memory[i] = binary[i];
|
|
}
|
|
}
|
|
|
|
chunk = reinterpret_cast<decltype (chunk)>(&aica_wave_memory[0x00100000 / 4]);
|
|
|
|
serial::integer<uint32_t>(reinterpret_cast<uint32_t>(&(*chunk)[0][0]));
|
|
serial::integer<uint32_t>(reinterpret_cast<uint32_t>(&(*chunk)[1][0]));
|
|
|
|
aica_fill_chunk(&(*chunk)[chunk_index][0],
|
|
src_chunk,
|
|
chunk_size);
|
|
chunk_index = (chunk_index + 1) % 2;
|
|
|
|
aica_wait_write(); aica_sound.common.vreg_armrst = aica::vreg_armrst::ARMRST(0);
|
|
|
|
{ // send arm interrupt
|
|
aica_sound.common.scipd = scipd__arm_interrupt;
|
|
}
|
|
}
|
|
|
|
void aica_step(uint32_t& chunk_index, const uint32_t * src_chunk)
|
|
{
|
|
{ // wait for interrupt from arm
|
|
while ((system.ISTEXT & (1 << 1)) == 0);
|
|
aica_wait_write(); aica_sound.common.mcire = mcipd__sh4_interrupt;
|
|
}
|
|
|
|
const uint32_t step_start = sh7091.TMU.TCNT0;
|
|
|
|
{ // fill the requested chunk
|
|
aica_fill_chunk(&(*chunk)[chunk_index][0],
|
|
src_chunk,
|
|
chunk_size);
|
|
|
|
chunk_index = (chunk_index + 1) % 2;
|
|
}
|
|
|
|
{ // send arm interrupt
|
|
aica_sound.common.scipd = scipd__arm_interrupt;
|
|
}
|
|
|
|
|
|
const uint32_t step_end = sh7091.TMU.TCNT0;
|
|
const uint32_t step_time = step_start - step_end;
|
|
serial::string("step: ");
|
|
serial::integer<uint32_t>(step_time);
|
|
}
|
|
|
|
// gdrom
|
|
|
|
void gdrom_pio_data(const uint8_t * data)
|
|
{
|
|
while ((gdrom::status::bsy(gdrom_if.status) | gdrom::status::drq(gdrom_if.status)) != 0);
|
|
|
|
gdrom_if.features = gdrom::features::dma::disable;
|
|
gdrom_if.drive_select = gdrom::drive_select::drive_select
|
|
| gdrom::drive_select::lun(0);
|
|
|
|
gdrom_if.command = gdrom::command::code::packet_command;
|
|
while (gdrom::status::drq(gdrom_if.status) == 0);
|
|
|
|
const uint16_t * buf = reinterpret_cast<const uint16_t *>(&data[0]);
|
|
for (int i = 0; i < 6; i++) {
|
|
gdrom_if.data = buf[i];
|
|
}
|
|
|
|
while (gdrom::status::bsy(gdrom_if.status) != 0);
|
|
}
|
|
|
|
void gdrom_read_data(uint16_t * buf, const uint32_t length)
|
|
{
|
|
//serial::string("read_data drq interrupt_reason: ");
|
|
//serial::integer<uint8_t>(gdrom::status::drq(gdrom_if.status), ' ');
|
|
//serial::integer<uint8_t>(gdrom_if.interrupt_reason);
|
|
for (uint32_t i = 0; i < (length / 2); i++) {
|
|
buf[i] = gdrom_if.data;
|
|
}
|
|
}
|
|
|
|
uint32_t gdrom_toc__get_data_track_fad()
|
|
{
|
|
auto packet = gdrom_command_packet_format::get_toc(0, // single-density
|
|
0x0198 // maximum toc length
|
|
);
|
|
serial::string("get_toc\n");
|
|
gdrom_pio_data(packet._data());
|
|
|
|
serial::string("byte_count: ");
|
|
serial::integer<uint16_t>(gdrom_if.byte_count());
|
|
uint16_t buf[gdrom_if.byte_count() / 2];
|
|
gdrom_read_data(buf, gdrom_if.byte_count());
|
|
|
|
serial::string("status: ");
|
|
serial::integer<uint8_t>(gdrom_if.status);
|
|
|
|
auto toc = reinterpret_cast<const struct gdrom_toc::toc *>(buf);
|
|
for (int i = 0; i < 99; i++) {
|
|
if (toc->track[i].fad() == 0xffffff)
|
|
break;
|
|
serial::string("track ");
|
|
serial::integer<uint8_t>(i);
|
|
serial::integer<uint32_t>(toc->track[i].fad());
|
|
}
|
|
|
|
// assume track 1 is the correct track
|
|
return toc->track[1].fad();
|
|
}
|
|
|
|
uint32_t gdrom_cd_read2(uint16_t * buf,
|
|
const uint32_t starting_address,
|
|
const uint32_t transfer_length,
|
|
const uint32_t next_address)
|
|
{
|
|
const uint8_t data_select = 0b0010; // data
|
|
const uint8_t expected_data_type = 0b100; // XA mode 2 form 1
|
|
const uint8_t parameter_type = 0b0; // FAD specified
|
|
const uint8_t data = (data_select << 4) | (expected_data_type << 1) | (parameter_type << 0);
|
|
|
|
auto packet = gdrom_command_packet_format::cd_read2(data,
|
|
starting_address,
|
|
transfer_length,
|
|
next_address);
|
|
//serial::string("cd_read\n");
|
|
//serial::string("starting_address: ");
|
|
//serial::integer<uint32_t>(starting_address);
|
|
//serial::string("transfer_length: ");
|
|
//serial::integer<uint32_t>(transfer_length);
|
|
//serial::string("next_address: ");
|
|
//serial::integer<uint32_t>(next_address);
|
|
gdrom_pio_data(packet._data());
|
|
|
|
while ((gdrom::status::bsy(gdrom_if.status)) != 0); // wait for drive to become not-busy
|
|
|
|
uint32_t length = 0;
|
|
while ((gdrom::status::drq(gdrom_if.status)) != 0) {
|
|
const uint32_t byte_count = gdrom_if.byte_count();
|
|
length += byte_count;
|
|
gdrom_read_data(buf, byte_count);
|
|
|
|
serial::string("status: ");
|
|
serial::integer<uint8_t>(gdrom_if.status);
|
|
|
|
while ((gdrom::status::bsy(gdrom_if.status)) != 0); // wait for drive to become not-busy
|
|
}
|
|
|
|
serial::string("length: ");
|
|
serial::integer<uint32_t>(length);
|
|
return length;
|
|
}
|
|
|
|
void gdrom_unlock()
|
|
{
|
|
// gdrom unlock undocumented register
|
|
g1_if.GDUNLOCK = 0x1fffff;
|
|
|
|
// Without this read from system_boot_rom, the read value of
|
|
// gdrom_if.status is always 0xff
|
|
for(uint32_t i = 0; i < 0x200000 / 4; i++) {
|
|
(void)system_boot_rom[i];
|
|
}
|
|
}
|
|
|
|
bool str_equal(const uint8_t * a,
|
|
const uint32_t a_len,
|
|
const char * b,
|
|
const uint32_t b_len)
|
|
{
|
|
if (a_len != b_len)
|
|
return false;
|
|
|
|
uint32_t len = a_len;
|
|
|
|
while (len != 0) {
|
|
if (*a++ != *b++)
|
|
return false;
|
|
|
|
len--;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
struct extent
|
|
{
|
|
const uint32_t location;
|
|
const uint32_t data_length;
|
|
};
|
|
|
|
struct extent gdrom_find_file()
|
|
{
|
|
const uint32_t fad = gdrom_toc__get_data_track_fad();
|
|
serial::character('\n');
|
|
|
|
const uint32_t primary_volume_descriptor = fad + 16;
|
|
uint16_t buf[2048 / 2];
|
|
gdrom_cd_read2(buf,
|
|
primary_volume_descriptor, // starting address
|
|
1, // one sector; 2048 bytes
|
|
primary_volume_descriptor + 1 // next address
|
|
);
|
|
serial::character('\n');
|
|
|
|
auto pvd = reinterpret_cast<const iso9660::primary_volume_descriptor *>(&buf[0]);
|
|
auto root_dr = reinterpret_cast<const iso9660::directory_record *>(&pvd->directory_record_for_root_directory[0]);
|
|
|
|
serial::string("primary volume descriptor:\n");
|
|
serial::string(" standard_identifier: ");
|
|
serial::string(pvd->standard_identifier, 5);
|
|
serial::character('\n');
|
|
serial::string(" root directory record:\n");
|
|
serial::string(" location of extent: ");
|
|
serial::integer<uint32_t>(root_dr->location_of_extent.get());
|
|
serial::string(" data length: ");
|
|
serial::integer<uint32_t>(root_dr->data_length.get());
|
|
|
|
serial::character('\n');
|
|
|
|
const uint32_t root_directory_extent = root_dr->location_of_extent.get();
|
|
gdrom_cd_read2(buf,
|
|
root_directory_extent + 150, // 150?
|
|
1, // one sector; 2048 bytes
|
|
root_directory_extent + 151 // 150?
|
|
);
|
|
serial::character('\n');
|
|
|
|
auto buf8 = reinterpret_cast<const uint8_t *>(buf);
|
|
uint32_t offset = 0;
|
|
while (true) {
|
|
serial::string("directory entry offset: ");
|
|
serial::integer<uint32_t>(offset);
|
|
|
|
auto dr = reinterpret_cast<const iso9660::directory_record *>(&buf8[offset]);
|
|
if (dr->length_of_directory_record == 0)
|
|
break;
|
|
|
|
serial::string(" length_of_directory_record: ");
|
|
serial::integer<uint8_t>(dr->length_of_directory_record);
|
|
serial::string(" length_of_file_identifier: ");
|
|
serial::integer<uint8_t>(dr->length_of_file_identifier);
|
|
serial::string(" file_identifier: ");
|
|
serial::string(dr->file_identifier, dr->length_of_file_identifier);
|
|
serial::character('\n');
|
|
|
|
bool equal = str_equal(dr->file_identifier, dr->length_of_file_identifier,
|
|
"REIGN.PCM;1", 11);
|
|
|
|
if (dr->file_flags == 0) {
|
|
serial::string(" location_of_extent: ");
|
|
serial::integer<uint32_t>(dr->location_of_extent.get());
|
|
serial::string(" data_length: ");
|
|
serial::integer<uint32_t>(dr->data_length.get());
|
|
|
|
if (equal) {
|
|
serial::string("FOUND\n");
|
|
return {
|
|
dr->location_of_extent.get(),
|
|
dr->data_length.get()
|
|
};
|
|
}
|
|
}
|
|
|
|
offset += dr->length_of_directory_record;
|
|
}
|
|
|
|
return { 0 , 0 };
|
|
}
|
|
|
|
void gdrom_read_chunk(uint32_t * buf, const uint32_t extent, const uint32_t num_extents)
|
|
{
|
|
const uint32_t gdrom_start = sh7091.TMU.TCNT0;
|
|
|
|
gdrom_cd_read2(reinterpret_cast<uint16_t *>(buf),
|
|
extent + 150, // 150?
|
|
num_extents, // one sector; 2048 bytes
|
|
extent + 150 + num_extents // 150?
|
|
);
|
|
|
|
const uint32_t gdrom_end = sh7091.TMU.TCNT0;
|
|
const uint32_t gdrom_time = gdrom_start - gdrom_end;
|
|
serial::string("time: ");
|
|
serial::integer<uint32_t>(gdrom_time);
|
|
}
|
|
|
|
void next_segment(const struct extent& extent, uint32_t& segment_index)
|
|
{
|
|
segment_index += sectors_per_chunk;
|
|
if ((segment_index * 2048) > extent.data_length)
|
|
segment_index = 0;
|
|
}
|
|
|
|
void main()
|
|
{
|
|
sh7091.TMU.TSTR = 0; // stop all timers
|
|
sh7091.TMU.TOCR = tmu::tocr::tcoe::tclk_is_external_clock_or_input_capture;
|
|
sh7091.TMU.TCR0 = tmu::tcr0::tpsc::p_phi_256; // 256 / 50MHz = 5.12 μs ; underflows in ~1 hour
|
|
sh7091.TMU.TCOR0 = 0xffff'ffff;
|
|
sh7091.TMU.TCNT0 = 0xffff'ffff;
|
|
sh7091.TMU.TSTR = tmu::tstr::str0::counter_start;
|
|
|
|
uint32_t chunk_index = 0;
|
|
uint32_t segment_index = 0;
|
|
|
|
gdrom_unlock();
|
|
const auto extent = gdrom_find_file();
|
|
uint32_t gdrom_buf[chunk_size / 4];
|
|
gdrom_read_chunk(gdrom_buf, extent.location + segment_index, sectors_per_chunk);
|
|
next_segment(extent, segment_index);
|
|
|
|
aica_init(chunk_index, &gdrom_buf[0]);
|
|
|
|
aica_sound.common.MCIEB(miceb__sh4_interrupt);
|
|
|
|
//serial::string("aica wave memory:\n");
|
|
//while (aica_wave_memory[0] == 0xeaffffff) { aica_wait_read(); };
|
|
//aica_wait_read(); serial::integer<uint32_t>(aica_wave_memory[0]);
|
|
//aica_wait_read(); serial::integer<uint32_t>(aica_wave_memory[1]);
|
|
|
|
while (1) {
|
|
gdrom_read_chunk(gdrom_buf, extent.location + segment_index, sectors_per_chunk);
|
|
next_segment(extent, segment_index);
|
|
|
|
aica_step(chunk_index, &gdrom_buf[0]);
|
|
}
|
|
|
|
while (1);
|
|
}
|