// The Potato Processor Benchmark Applications
|
// The Potato Processor Benchmark Applications
|
// (c) Kristian Klomsten Skordal 2015 <kristian.skordal@wafflemail.net>
|
// (c) Kristian Klomsten Skordal 2015 <kristian.skordal@wafflemail.net>
|
// Report bugs and issues on <http://opencores.org/project,potato,bugtracker>
|
// Report bugs and issues on <http://opencores.org/project,potato,bugtracker>
|
|
|
#include <stdbool.h>
|
#include <stdbool.h>
|
#include <stdint.h>
|
#include <stdint.h>
|
|
|
#include "platform.h"
|
#include "platform.h"
|
#include "potato.h"
|
#include "potato.h"
|
|
|
#include "gpio.h"
|
#include "gpio.h"
|
#include "sha256.h"
|
#include "sha256.h"
|
#include "timer.h"
|
#include "timer.h"
|
#include "uart.h"
|
#include "uart.h"
|
|
|
static int led_status = 0;
|
static int led_status = 0;
|
static volatile int hashes_per_second = 0;
|
static volatile int hashes_per_second = 0;
|
|
|
void exception_handler(uint32_t cause, void * epc)
|
// Handle an exception/interrupt.
|
|
// Arguments:
|
|
// - cause: exception cause, see potato.h for values
|
|
// - epc: exception return address
|
|
// - regbase: base of the stored context, can be used for printing all
|
|
// registers with regbase[0] = x1 and upwards.
|
|
void exception_handler(uint32_t cause, void * epc, void * regbase)
|
|
{
|
|
if(cause == (CAUSE_IRQ_BASE + 5)) // Timer interrupt
|
{
|
{
|
uart_puts(IO_ADDRESS(UART_BASE), "Hashes per second: ");
|
uart_puts(IO_ADDRESS(UART_BASE), "Hashes per second: ");
|
uart_puth(IO_ADDRESS(UART_BASE), hashes_per_second);
|
uart_puth(IO_ADDRESS(UART_BASE), hashes_per_second);
|
uart_puts(IO_ADDRESS(UART_BASE), "\n\r");
|
uart_puts(IO_ADDRESS(UART_BASE), "\n\r");
|
|
|
if(led_status == 0)
|
if(led_status == 0)
|
{
|
{
|
gpio_set_output(IO_ADDRESS(GPIO2_BASE), 1);
|
gpio_set_output(IO_ADDRESS(GPIO2_BASE), 1);
|
led_status = 1;
|
led_status = 1;
|
} else {
|
} else {
|
gpio_set_output(IO_ADDRESS(GPIO2_BASE), 0);
|
gpio_set_output(IO_ADDRESS(GPIO2_BASE), 0);
|
led_status = 0;
|
led_status = 0;
|
}
|
}
|
|
|
timer_reset(IO_ADDRESS(TIMER_BASE));
|
|
hashes_per_second = 0;
|
hashes_per_second = 0;
|
|
timer_reset(IO_ADDRESS(TIMER_BASE));
|
|
} else {
|
|
uart_puts(IO_ADDRESS(UART_BASE), "Unhandled exception!\n\r");
|
|
uart_puts(IO_ADDRESS(UART_BASE), "Cause: ");
|
|
uart_puth(IO_ADDRESS(UART_BASE), cause);
|
|
uart_puts(IO_ADDRESS(UART_BASE), "\n\r");
|
|
uart_puts(IO_ADDRESS(UART_BASE), "EPC: ");
|
|
uart_puth(IO_ADDRESS(UART_BASE), (uint32_t) epc);
|
|
uart_puts(IO_ADDRESS(UART_BASE), "\n\r");
|
|
|
|
while(1) asm volatile("nop\n");
|
|
}
|
}
|
}
|
|
|
int main(void)
|
int main(void)
|
{
|
{
|
// Configure GPIOs:
|
// Configure GPIOs:
|
gpio_set_direction(IO_ADDRESS(GPIO1_BASE), 0x0000); // Switches
|
gpio_set_direction(IO_ADDRESS(GPIO1_BASE), 0x0000); // Switches
|
gpio_set_direction(IO_ADDRESS(GPIO2_BASE), 0xffff); // LEDs
|
gpio_set_direction(IO_ADDRESS(GPIO2_BASE), 0xffff); // LEDs
|
|
|
// Set up the timer:
|
// Set up the timer:
|
timer_set(IO_ADDRESS(TIMER_BASE), 50000000);
|
timer_set(IO_ADDRESS(TIMER_BASE), SYSTEM_CLK_FREQ);
|
|
|
// Print a startup message:
|
// Print a startup message:
|
uart_puts(IO_ADDRESS(UART_BASE), "The Potato Processor SHA256 Benchmark\n\r\n\r");
|
uart_puts(IO_ADDRESS(UART_BASE), "The Potato Processor SHA256 Benchmark\n\r\n\r");
|
|
|
// Enable interrupts:
|
// Enable interrupts:
|
potato_enable_irq(TIMER_IRQ);
|
potato_enable_irq(TIMER_IRQ);
|
potato_enable_interrupts();
|
potato_enable_interrupts();
|
|
|
struct sha256_context context;
|
struct sha256_context context;
|
|
|
// Prepare a block for hashing:
|
// Prepare a block for hashing:
|
uint32_t block[16];
|
uint32_t block[16];
|
uint8_t * block_ptr = (uint8_t *) block;
|
uint8_t * block_ptr = (uint8_t *) block;
|
block_ptr[0] = 'a';
|
block_ptr[0] = 'a';
|
block_ptr[1] = 'b';
|
block_ptr[1] = 'b';
|
block_ptr[2] = 'c';
|
block_ptr[2] = 'c';
|
sha256_pad_le_block(block_ptr, 3, 3);
|
sha256_pad_le_block(block_ptr, 3, 3);
|
|
|
// Repeatedly hash the same data over and over again:
|
// Repeatedly hash the same data over and over again:
|
while(true)
|
while(true)
|
{
|
{
|
uint8_t hash[32];
|
uint8_t hash[32];
|
|
|
sha256_reset(&context);
|
sha256_reset(&context);
|
sha256_hash_block(&context, block);
|
sha256_hash_block(&context, block);
|
sha256_get_hash(&context, hash);
|
sha256_get_hash(&context, hash);
|
++hashes_per_second;
|
++hashes_per_second;
|
}
|
}
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
