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cpu buffer

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Polprzewodnikowy 2022-01-20 20:28:59 +01:00
parent afc41658e3
commit ccaa4a815e
13 changed files with 125 additions and 243 deletions
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3
build.sh
View File

@ -90,9 +90,10 @@ build_fpga () {
else else
if [ "$DEBUG_ENABLED" = true ]; then if [ "$DEBUG_ENABLED" = true ]; then
quartus_sh --set VERILOG_MACRO="DEBUG" ./SummerCart64.qpf quartus_sh --set VERILOG_MACRO="DEBUG" ./SummerCart64.qpf
else
quartus_sh --set -remove VERILOG_MACRO="DEBUG" ./SummerCart64.qpf
fi fi
quartus_sh --flow compile ./SummerCart64.qpf quartus_sh --flow compile ./SummerCart64.qpf
quartus_sh --set -remove VERILOG_MACRO="DEBUG" ./SummerCart64.qpf
fi fi
popd > /dev/null popd > /dev/null

4
fw/rtl/SummerCart64.sv
View File

@ -70,6 +70,8 @@ module SummerCart64 (
.dd_interrupt(dd_interrupt) .dd_interrupt(dd_interrupt)
); );
if_cpu_ram cpu_ram ();
system system_inst ( system system_inst (
.sys(sys) .sys(sys)
); );
@ -89,6 +91,7 @@ module SummerCart64 (
.si(si), .si(si),
.flash(flash), .flash(flash),
.dd(dd), .dd(dd),
.cpu_ram(cpu_ram),
.n64_pi_alel(i_n64_pi_alel), .n64_pi_alel(i_n64_pi_alel),
.n64_pi_aleh(i_n64_pi_aleh), .n64_pi_aleh(i_n64_pi_aleh),
@ -117,6 +120,7 @@ module SummerCart64 (
.si(si), .si(si),
.flash(flash), .flash(flash),
.dd(dd), .dd(dd),
.cpu_ram(cpu_ram),
.gpio_o(gpio_o), .gpio_o(gpio_o),
.gpio_i(gpio_i), .gpio_i(gpio_i),

48
fw/rtl/cpu/cpu_ram.sv
View File

@ -1,10 +1,36 @@
interface if_cpu_ram ();
logic write;
logic [12:0] address;
logic [15:0] rdata;
logic [15:0] wdata;
modport cpu (
input write,
input address,
output rdata,
input wdata
);
modport external (
output write,
output address,
input rdata,
output wdata
);
endinterface
module cpu_ram ( module cpu_ram (
if_system.sys sys, if_system.sys sys,
if_cpu_bus bus if_cpu_bus bus,
if_cpu_ram.cpu cpu_ram
); );
logic [3:0][7:0] ram [0:4095]; logic [3:0][7:0] ram [0:4095];
logic [31:0] q; logic [31:0] q_cpu;
logic [31:0] q_external;
always_ff @(posedge sys.clk) begin always_ff @(posedge sys.clk) begin
bus.ack <= 1'b0; bus.ack <= 1'b0;
@ -14,14 +40,15 @@ module cpu_ram (
end end
always_comb begin always_comb begin
cpu_ram.rdata = cpu_ram.address[0] ? q_external[31:16] : q_external[15:0];
bus.rdata = 32'd0; bus.rdata = 32'd0;
if (bus.ack) begin if (bus.ack) begin
bus.rdata = q; bus.rdata = q_cpu;
end end
end end
always_ff @(posedge sys.clk) begin always_ff @(posedge sys.clk) begin
q <= ram[bus.address[13:2]]; q_cpu <= ram[bus.address[13:2]];
if (bus.request) begin if (bus.request) begin
if (bus.wmask[0]) ram[bus.address[13:2]][0] <= bus.wdata[7:0]; if (bus.wmask[0]) ram[bus.address[13:2]][0] <= bus.wdata[7:0];
if (bus.wmask[1]) ram[bus.address[13:2]][1] <= bus.wdata[15:8]; if (bus.wmask[1]) ram[bus.address[13:2]][1] <= bus.wdata[15:8];
@ -30,4 +57,17 @@ module cpu_ram (
end end
end end
always_ff @(posedge sys.clk) begin
q_external <= ram[cpu_ram.address[12:1]];
if (cpu_ram.write) begin
if (cpu_ram.address[0]) begin
ram[cpu_ram.address[12:1]][2] <= cpu_ram.wdata[7:0];
ram[cpu_ram.address[12:1]][3] <= cpu_ram.wdata[15:8];
end else begin
ram[cpu_ram.address[12:1]][0] <= cpu_ram.wdata[7:0];
ram[cpu_ram.address[12:1]][1] <= cpu_ram.wdata[15:8];
end
end
end
endmodule endmodule

4
fw/rtl/cpu/cpu_soc.sv
View File

@ -7,6 +7,7 @@ module cpu_soc (
if_si.cpu si, if_si.cpu si,
if_flash.cpu flash, if_flash.cpu flash,
if_dd.cpu dd, if_dd.cpu dd,
if_cpu_ram.cpu cpu_ram,
input [7:0] gpio_i, input [7:0] gpio_i,
output [7:0] gpio_o, output [7:0] gpio_o,
@ -38,7 +39,8 @@ module cpu_soc (
cpu_ram cpu_ram_inst ( cpu_ram cpu_ram_inst (
.sys(sys), .sys(sys),
.bus(bus.at[sc64::ID_CPU_RAM].device) .bus(bus.at[sc64::ID_CPU_RAM].device),
.cpu_ram(cpu_ram)
); );
cpu_flash cpu_flash_inst ( cpu_flash cpu_flash_inst (

13
fw/rtl/n64/n64_cfg.sv
View File

@ -1,7 +1,8 @@
module n64_cfg ( module n64_cfg (
if_system sys, if_system sys,
if_n64_bus bus, if_n64_bus bus,
if_config.n64 cfg if_config.n64 cfg,
if_cpu_ram.external cpu_ram
); );
typedef enum bit [3:0] { typedef enum bit [3:0] {
@ -23,8 +24,15 @@ module n64_cfg (
e_state state; e_state state;
always_comb begin always_comb begin
cpu_ram.write = bus.request && bus.write && bus.address[14];
cpu_ram.address = bus.address[13:1];
cpu_ram.wdata = {bus.wdata[7:0], bus.wdata[15:8]};
bus.rdata = 16'd0; bus.rdata = 16'd0;
if (bus.ack) begin if (bus.ack) begin
if (bus.address[14]) begin
bus.rdata = {cpu_ram.rdata[7:0], cpu_ram.rdata[15:8]};
end else if (!(&bus.address[13:4])) begin
case (bus.address[3:1]) case (bus.address[3:1])
R_SR: bus.rdata = { R_SR: bus.rdata = {
cfg.cpu_ready, cfg.cpu_ready,
@ -43,6 +51,7 @@ module n64_cfg (
endcase endcase
end end
end end
end
always_ff @(posedge sys.clk) begin always_ff @(posedge sys.clk) begin
bus.ack <= 1'b0; bus.ack <= 1'b0;
@ -59,7 +68,7 @@ module n64_cfg (
if (bus.request) begin if (bus.request) begin
state <= S_WAIT; state <= S_WAIT;
bus.ack <= 1'b1; bus.ack <= 1'b1;
if (bus.write) begin if (bus.write && (!(&bus.address[14:4]))) begin
case (bus.address[3:1]) case (bus.address[3:1])
R_COMMAND: begin R_COMMAND: begin
cfg.cmd <= bus.wdata[7:0]; cfg.cmd <= bus.wdata[7:0];

5
fw/rtl/n64/n64_pi.sv
View File

@ -282,11 +282,6 @@ module n64_pi (
n64_pi_address_valid <= 1'b0; n64_pi_address_valid <= 1'b0;
end end
end end
if (cfg_selected) begin
if (|n64_pi_ad_input[15:4]) begin
n64_pi_address_valid <= 1'b0;
end
end
end end
end end

4
fw/rtl/n64/n64_soc.sv
View File

@ -7,6 +7,7 @@ module n64_soc (
if_si.si si, if_si.si si,
if_flash.memory flash, if_flash.memory flash,
if_dd dd, if_dd dd,
if_cpu_ram.external cpu_ram,
input n64_pi_alel, input n64_pi_alel,
input n64_pi_aleh, input n64_pi_aleh,
@ -90,7 +91,8 @@ module n64_soc (
n64_cfg n64_cfg_inst ( n64_cfg n64_cfg_inst (
.sys(sys), .sys(sys),
.bus(bus.at[sc64::ID_N64_CFG].device), .bus(bus.at[sc64::ID_N64_CFG].device),
.cfg(cfg) .cfg(cfg),
.cpu_ram(cpu_ram)
); );
endmodule endmodule

2
sw/n64/src/exception.c
View File

@ -113,7 +113,7 @@ static const vi_regs_t vi_config[] = {{
.V_INTR = 0x000003FF, .V_INTR = 0x000003FF,
.CURR_LINE = 0x00000000, .CURR_LINE = 0x00000000,
.TIMING = 0x03E52239, .TIMING = 0x03E52239,
.V_SYNC = 0x0000020D, .V_SYNC = 0x0000020C,
.H_SYNC = 0x00000C15, .H_SYNC = 0x00000C15,
.H_SYNC_LEAP = 0x0C150C15, .H_SYNC_LEAP = 0x0C150C15,
.H_LIMITS = 0x006C02EC, .H_LIMITS = 0x006C02EC,

3
sw/n64/src/io.h
View File

@ -229,6 +229,9 @@ typedef struct {
io32_t SR_CMD; io32_t SR_CMD;
io32_t DATA[2]; io32_t DATA[2];
io32_t VERSION; io32_t VERSION;
io32_t __padding[4092];
io32_t CPU_RAM[3840];
io32_t BUFFER[256];
} sc64_regs_t; } sc64_regs_t;
#define SC64_BASE (0x1FFF0000UL) #define SC64_BASE (0x1FFF0000UL)

165
sw/n64/src/sc64.c
View File

@ -35,179 +35,40 @@ bool sc64_perform_cmd (uint8_t cmd, uint32_t *args, uint32_t *result) {
return error; return error;
} }
uint32_t sc64_get_config (cfg_id_t id) { uint32_t sc64_query_config (cfg_id_t id) {
uint32_t args[2] = { id, 0 }; uint32_t args[2] = { id, 0 };
uint32_t result[2]; uint32_t result[2];
sc64_perform_cmd(SC64_CMD_QUERY, args, result); sc64_perform_cmd(SC64_CMD_QUERY, args, result);
return result[1]; return result[1];
} }
void sc64_set_config (cfg_id_t id, uint32_t value) { void sc64_change_config (cfg_id_t id, uint32_t value) {
uint32_t args[2] = { id, value }; uint32_t args[2] = { id, value };
sc64_perform_cmd(SC64_CMD_CONFIG, args, NULL); sc64_perform_cmd(SC64_CMD_CONFIG, args, NULL);
} }
void sc64_get_info (sc64_info_t *info) { void sc64_get_info (sc64_info_t *info) {
// info->dd_enabled = (bool) sc64_get_config(CFG_ID_DD_ENABLE); info->cic_seed = (uint16_t) sc64_query_config(CFG_ID_CIC_SEED);
// info->is_viewer_enabled = (bool) sc64_get_config(CFG_ID_IS_VIEWER_ENABLE); info->tv_type = (tv_type_t) sc64_query_config(CFG_ID_TV_TYPE);
// info->save_type = (save_type_t) sc64_get_config(CFG_ID_SAVE_TYPE); info->boot_mode = (boot_mode_t) sc64_query_config(CFG_ID_BOOT_MODE);
info->cic_seed = (uint16_t) sc64_get_config(CFG_ID_CIC_SEED);
info->tv_type = (tv_type_t) sc64_get_config(CFG_ID_TV_TYPE);
// info->save_location = (io32_t *) (0x10000000 | sc64_get_config(CFG_ID_SAVE_OFFEST));
// info->ddipl_location = (io32_t *) (0x10000000 | sc64_get_config(CFG_ID_DDIPL_OFFEST));
info->boot_mode = (boot_mode_t) sc64_get_config(CFG_ID_BOOT_MODE);
} }
// void sc64_wait_usb_rx_ready (uint32_t *type, uint32_t *length) { void sc64_uart_put_char (char c) {
// uint32_t result[2]; #ifdef DEBUG
// do { uint32_t args[2] = { (uint32_t) (c), 0 };
// sc64_perform_cmd(SC64_CMD_DEBUG_RX_READY, NULL, result); sc64_perform_cmd(SC64_CMD_UART_PUT, args, NULL);
// } while (result[0] == 0 && result[1] == 0); #endif
// *type = result[0];
// *length = result[1];
// }
// void sc64_wait_usb_rx_busy (void) {
// uint32_t result[2];
// do {
// sc64_perform_cmd(SC64_CMD_DEBUG_RX_BUSY, NULL, result);
// } while (result[0]);
// }
// void sc64_usb_rx_data (io32_t *address, uint32_t length) {
// uint32_t args[2] = { (uint32_t) (address), ALIGN(length, 2) };
// sc64_perform_cmd(SC64_CMD_DEBUG_RX_DATA, args, NULL);
// }
// void sc64_wait_usb_tx_ready (void) {
// uint32_t result[2];
// do {
// sc64_perform_cmd(SC64_CMD_DEBUG_TX_READY, NULL, result);
// } while (!result[0]);
// }
// void sc64_usb_tx_data (io32_t *address, uint32_t length) {
// uint32_t args[2] = { (uint32_t) (address), ALIGN(length, 2) };
// sc64_perform_cmd(SC64_CMD_DEBUG_TX_DATA, args, NULL);
// }
// void sc64_debug_write (uint8_t type, const void *data, uint32_t len) {
// char *dma = "DMA@";
// char *cmp = "CMPH";
// io32_t *sdram = (io32_t *) (SC64_DEBUG_WRITE_ADDRESS);
// uint8_t *src = (uint8_t *) (data);
// uint32_t tmp;
// io32_t *dst = sdram;
// uint32_t copy_length = ALIGN(len, 4);
// sc64_wait_usb_tx_ready();
// bool writable = sc64_get_config(CFG_ID_SDRAM_WRITABLE);
// bool sdram_switched = sc64_get_config(CFG_ID_SDRAM_SWITCH);
// if (!writable) {
// sc64_set_config(CFG_ID_SDRAM_WRITABLE, true);
// }
// if (!sdram_switched) {
// sc64_set_config(CFG_ID_SDRAM_SWITCH, true);
// }
// pi_io_write(dst++, *((uint32_t *) (dma)));
// pi_io_write(dst++, (type << 24) | len);
// while (src < ((uint8_t *) (data + copy_length))) {
// tmp = ((*src++) << 24);
// tmp |= ((*src++) << 16);
// tmp |= ((*src++) << 8);
// tmp |= ((*src++) << 0);
// pi_io_write(dst++, tmp);
// if (dst >= (io32_t *) ((void *) (sdram) + SC64_DEBUG_MAX_SIZE)) {
// sc64_usb_tx_data(sdram, (dst - sdram) * sizeof(uint32_t));
// sc64_wait_usb_tx_ready();
// dst = sdram;
// }
// }
// pi_io_write(dst++, *((uint32_t *) (cmp)));
// if (!writable) {
// sc64_set_config(CFG_ID_SDRAM_WRITABLE, false);
// }
// if (!sdram_switched) {
// sc64_set_config(CFG_ID_SDRAM_SWITCH, false);
// }
// sc64_usb_tx_data(sdram, (dst - sdram) * sizeof(uint32_t));
// }
// void sc64_debug_fsd_read (const void *data, uint32_t sector, uint32_t count) {
// uint32_t type;
// uint32_t length;
// io32_t *sdram = (io32_t *) (SC64_DEBUG_READ_ADDRESS);
// io32_t *src = sdram;
// uint32_t tmp;
// uint8_t *dst = (uint8_t *) (data);
// uint32_t read_length = count * 512;
// sc64_debug_write(SC64_DEBUG_ID_FSD_SECTOR, &sector, 4);
// sc64_debug_write(SC64_DEBUG_ID_FSD_READ, &read_length, 4);
// sc64_wait_usb_rx_ready(&type, &length);
// sc64_usb_rx_data(sdram, length);
// sc64_wait_usb_rx_busy();
// uint32_t copy_length = ALIGN(length, 4);
// bool sdram_switched = sc64_get_config(CFG_ID_SDRAM_SWITCH);
// if (!sdram_switched) {
// sc64_set_config(CFG_ID_SDRAM_SWITCH, true);
// }
// for (int i = 0; i < copy_length; i += 4) {
// tmp = pi_io_read(src++);
// *dst++ = (tmp >> 24);
// *dst++ = (tmp >> 16);
// *dst++ = (tmp >> 8);
// *dst++ = (tmp & 0xFF);
// }
// if (!sdram_switched) {
// sc64_set_config(CFG_ID_SDRAM_SWITCH, false);
// }
// }
// void sc64_debug_fsd_write (const void *data, uint32_t sector, uint32_t count) {
// sc64_debug_write(SC64_DEBUG_ID_FSD_SECTOR, &sector, 4);
// sc64_debug_write(SC64_DEBUG_ID_FSD_WRITE, data, count * 512);
// }
// void sc64_init_is_viewer (void) {
// sc64_set_config(CFG_ID_SDRAM_WRITABLE, true);
// pi_io_write(&ISV->ID, 0);
// }
sc64_storage_error_t sc64_storage_read(sc64_storage_type_t storage_type, const void *buff, uint32_t sector, uint32_t count) {
return SC64_STORAGE_ERROR;
} }
void sc64_uart_print_string (const char *text) { void sc64_uart_print_string (const char *text) {
#ifdef DEBUG
uint32_t args[2] = { 0, 0 };
while (*text != '\0') { while (*text != '\0') {
args[0] = (uint32_t) (*text++); sc64_uart_put_char (*text++);
sc64_perform_cmd(SC64_CMD_UART_PUT, args, NULL);
} }
#endif
} }
void sc64_init (void) { void sc64_init (void) {
while (!sc64_check_presence()); while (!sc64_check_presence());
sc64_wait_cpu_ready(); sc64_wait_cpu_ready();
sc64_set_config(CFG_ID_SDRAM_SWITCH, true); sc64_change_config(CFG_ID_SDRAM_SWITCH, true);
sc64_uart_print_string("\033c");
} }

74
sw/n64/src/sc64.h
View File

@ -4,30 +4,15 @@
#include <stdbool.h> #include <stdbool.h>
#include <stdint.h> #include <stdint.h>
// #include <stdio.h>
#include "io.h" #include "io.h"
#define SC64_CMD_CONFIG ('C')
#define SC64_CMD_QUERY ('Q') #define SC64_CMD_QUERY ('Q')
// #define SC64_CMD_DEBUG_RX_DATA ('E') #define SC64_CMD_CONFIG ('C')
// #define SC64_CMD_DEBUG_RX_READY ('A')
// #define SC64_CMD_DEBUG_RX_BUSY ('F')
// #define SC64_CMD_DEBUG_TX_DATA ('D')
// #define SC64_CMD_DEBUG_TX_READY ('S')
#define SC64_CMD_UART_PUT ('Z') #define SC64_CMD_UART_PUT ('Z')
#define SC64_VERSION_2 (0x53437632) #define SC64_VERSION_2 (0x53437632)
// #define SC64_DEBUG_WRITE_ADDRESS (0x13FF8000UL)
// #define SC64_DEBUG_READ_ADDRESS (0x13FF0000UL)
// #define SC64_DEBUG_MAX_SIZE (32 * 1024)
// #define SC64_DEBUG_ID_TEXT (0x01)
// #define SC64_DEBUG_ID_FSD_READ (0xF1)
// #define SC64_DEBUG_ID_FSD_WRITE (0xF2)
// #define SC64_DEBUG_ID_FSD_SECTOR (0xF3)
typedef enum { typedef enum {
CFG_ID_SCR, CFG_ID_SCR,
@ -50,15 +35,19 @@ typedef enum {
CFG_ID_IS_VIEWER_ENABLE, CFG_ID_IS_VIEWER_ENABLE,
} cfg_id_t; } cfg_id_t;
// typedef enum { typedef enum {
// SAVE_TYPE_NONE = 0, SAVE_TYPE_NONE = 0,
// SAVE_TYPE_EEPROM_4K = 1, SAVE_TYPE_EEPROM_4K = 1,
// SAVE_TYPE_EEPROM_16K = 2, SAVE_TYPE_EEPROM_16K = 2,
// SAVE_TYPE_SRAM = 3, SAVE_TYPE_SRAM = 3,
// SAVE_TYPE_FLASHRAM = 4, SAVE_TYPE_FLASHRAM = 4,
// SAVE_TYPE_SRAM_BANKED = 5, SAVE_TYPE_SRAM_BANKED = 5,
// SAVE_TYPE_FLASHRAM_PKST2 = 6, SAVE_TYPE_FLASHRAM_PKST2 = 6,
// } save_type_t; } save_type_t;
typedef enum {
CIC_SEED_UNKNOWN = 0xFFFF,
} cic_seed_t;
typedef enum { typedef enum {
TV_TYPE_PAL = 0, TV_TYPE_PAL = 0,
@ -67,10 +56,6 @@ typedef enum {
TV_TYPE_UNKNOWN = 3, TV_TYPE_UNKNOWN = 3,
} tv_type_t; } tv_type_t;
typedef enum {
CIC_SEED_UNKNOWN = 0xFFFF,
} cic_seed_t;
typedef enum { typedef enum {
BOOT_MODE_MENU_SD = 0, BOOT_MODE_MENU_SD = 0,
BOOT_MODE_MENU_USB = 1, BOOT_MODE_MENU_USB = 1,
@ -80,46 +65,21 @@ typedef enum {
} boot_mode_t; } boot_mode_t;
typedef struct { typedef struct {
// bool dd_enabled;
// bool is_viewer_enabled;
// save_type_t save_type;
boot_mode_t boot_mode; boot_mode_t boot_mode;
uint16_t cic_seed; uint16_t cic_seed;
tv_type_t tv_type; tv_type_t tv_type;
// io32_t *save_location;
// io32_t *ddipl_location;
} sc64_info_t; } sc64_info_t;
typedef enum {
SC64_STORAGE_TYPE_SD,
SC64_STORAGE_TYPE_USB,
} sc64_storage_type_t;
typedef enum {
SC64_STORAGE_OK,
SC64_STORAGE_ERROR,
} sc64_storage_error_t;
bool sc64_check_presence (void); bool sc64_check_presence (void);
void sc64_wait_cpu_ready (void); void sc64_wait_cpu_ready (void);
bool sc64_wait_cpu_busy (void); bool sc64_wait_cpu_busy (void);
bool sc64_perform_cmd (uint8_t cmd, uint32_t *args, uint32_t *result); bool sc64_perform_cmd (uint8_t cmd, uint32_t *args, uint32_t *result);
uint32_t sc64_get_config (cfg_id_t id); uint32_t sc64_query_config (cfg_id_t id);
void sc64_set_config (cfg_id_t id, uint32_t value); void sc64_change_config (cfg_id_t id, uint32_t value);
void sc64_get_info (sc64_info_t *info); void sc64_get_info (sc64_info_t *info);
// void sc64_wait_usb_rx_ready (uint32_t *type, uint32_t *length); void sc64_uart_put_char (char c);
// void sc64_wait_usb_rx_busy (void);
// void sc64_usb_rx_data (io32_t *address, uint32_t length);
// void sc64_wait_usb_tx_ready (void);
// void sc64_usb_tx_data (io32_t *address, uint32_t length);
// void sc64_debug_write (uint8_t type, const void *data, uint32_t len);
// void sc64_debug_fsd_read (const void *data, uint32_t sector, uint32_t count);
// void sc64_debug_fsd_write (const void *data, uint32_t sector, uint32_t count);
// void sc64_init_is_viewer (void);
void sc64_uart_print_string (const char *text); void sc64_uart_print_string (const char *text);
sc64_storage_error_t sc64_storage_read(sc64_storage_type_t storage_type, const void *buff, uint32_t sector, uint32_t count);
void sc64_init (void); void sc64_init (void);

7
sw/riscv/SC64.ld
View File

@ -1,5 +1,6 @@
MEMORY { MEMORY {
ram (rwx) : org = 0x00000000, len = 16k ram (rwx) : org = 0x00000000, len = 15k
buffer (rw) : org = 0x00003C00, len = 1k
rom (rx) : org = 0x10010000, len = 26k rom (rx) : org = 0x10010000, len = 26k
} }
@ -44,6 +45,10 @@ SECTIONS {
_ebss = .; _ebss = .;
} > ram } > ram
.buffer : {
*(.buffer)
} > buffer
__global_pointer$ = MIN(_ssdata + 0x800, MAX(_sdata + 0x800, _ebss - 0x800)); __global_pointer$ = MIN(_ssdata + 0x800, MAX(_sdata + 0x800, _ebss - 0x800));
__stack_pointer$ = ORIGIN(ram) + LENGTH(ram); __stack_pointer$ = ORIGIN(ram) + LENGTH(ram);
} }

2
sw/riscv/src/cfg.c
View File

@ -247,7 +247,7 @@ void cfg_init (void) {
set_save_type(SAVE_TYPE_NONE); set_save_type(SAVE_TYPE_NONE);
CFG->DDIPL_OFFSET = DEFAULT_DDIPL_OFFSET; CFG->DDIPL_OFFSET = DEFAULT_DDIPL_OFFSET;
CFG->SCR = CFG_SCR_CPU_READY | CFG_SCR_SDRAM_SWITCH; CFG->SCR = CFG_SCR_CPU_READY;
p.cic_seed = 0xFFFF; p.cic_seed = 0xFFFF;
p.tv_type = 0x03; p.tv_type = 0x03;