[sw] BootROM default is SPI bootstrap

This is a better default because on FPGA the LEDs will show activity
when the bitstream is first flashed and both DRAM and SRAM are disabled.

Signed-off-by: Marno van der Maas <mvdmaas+git@lowrisc.org>

Author: marnovandermaas

sw/device/bootrom/bootrom.c

@@ -15,7 +15,7 @@
 #include <stdint.h>
 
 #define MAJOR "00"
-#define MINOR "01"
+#define MINOR "02"
 #define PATCH "00"
 
 const uintptr_t boot_slots[] = { 0x10000000, 0x80000000 };
@@ -56,19 +56,15 @@ int boot_main(void)
 
     timer_init(boot_ctx.timer);
     timer_enable_write(boot_ctx.timer, true);
-    if (bootstrap_requested(&boot_ctx)) {
+
+    uint32_t boot_addr;
+    if (bootstrap_requested(&boot_ctx) || !get_boot_addr(&boot_addr)) {
         uprintf(boot_ctx.console, "Entering SPI bootstrap\n");
         clear_slots(); // Cleaning slots from previeous boot.
         // Spin polling the spi_dev and processing incoming data until a reset command is received.
         spi_boot_strap(&boot_ctx);
     }
 
-    uint32_t boot_addr;
-    if (!get_boot_addr(&boot_addr)) {
-        uprintf(boot_ctx.console, "No valid slot found, default to DRAM\n");
-        boot_addr = dram_base;
-    }
-
     uprintf(boot_ctx.console, "\nJumping to: 0x%x\n", boot_addr);
     boot(boot_addr);
     uprintf(boot_ctx.console, "\nFailed to boot?\n");