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xduoox3: Bootloader improvements: 

* Explicitly clear the caches prior to launching the binary
 * Ensure the function that launches the binary is in iram
 * Re-sequenced some of the subsystem initializations
 * Fixes for USB mode

Change-Id: Ie020b18586b2599edeb88529dd3d7337e33a5a6f
This commit is contained in:
Solomon Peachy 2021-08-21 21:25:01 -04:00
parent 247258b9d2
commit e07c460eef
1 changed files with 27 additions and 19 deletions
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46
bootloader/xduoox3.c
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@ -55,13 +55,18 @@ static void show_splash(int timeout, const char *msg)
sleep(timeout);
}
static int usb_inited = 0;
static void usb_mode(void)
{
int button;
/* Init USB */
usb_init();
usb_start_monitoring();
/* Init USB, but only once */
if (!usb_inited) {
usb_init();
usb_start_monitoring();
usb_inited = 1;
}
/* Wait for threads to connect */
show_splash(HZ/2, "Waiting for USB");
@ -91,10 +96,20 @@ static void usb_mode(void)
}
#endif
/* Jump to loaded binary */
void exec(void* addr) __attribute__((noinline, noreturn, section(".icode")));
void exec(void* addr)
{
commit_discard_idcache();
typedef void(*entry_fn)(void) __attribute__((noreturn));
entry_fn fn = (entry_fn)addr;
fn();
}
static int boot_rockbox(void)
{
int rc;
void (*kernel_entry)(void);
printf("Mounting disk...\n");
@ -103,7 +118,6 @@ static int boot_rockbox(void)
verbose = true;
#ifdef HAVE_BOOTLOADER_USB_MODE
error(EDISK, rc, false);
usb_start_monitoring();
usb_mode();
#else
error(EDISK, rc, true);
@ -118,11 +132,8 @@ static int boot_rockbox(void)
{
printf("Starting Rockbox...\n");
adc_close(); /* Disable SADC, seems to fix the re-init Rockbox does */
disable_interrupt();
kernel_entry = (void*) CONFIG_SDRAM_START;
kernel_entry();
exec((void*) CONFIG_SDRAM_START);
return 0; /* Shouldn't happen */
}
}
@ -152,13 +163,13 @@ int main(void)
serial_puts("\n\nSPL Stage 2\n\n");
system_init();
kernel_init();
lcd_init();
font_init();
lcd_setfont(FONT_SYSFIXED);
button_init();
backlight_init();
show_logo();
rc = storage_init();
@ -170,23 +181,20 @@ int main(void)
filesystem_init();
#ifdef HAVE_BOOTLOADER_USB_MODE
button_init_device();
int btn = button_read_device();
/* Don't mount the disks yet, there could be file system/partition errors
which are fixable in USB mode */
usb_init();
#ifdef HAVE_BOOTLOADER_USB_MODE
button_init();
int btn = button_read_device();
/* Enter USB mode if USB is plugged and PLAY button is pressed */
if(btn & BUTTON_PLAY) {
usb_start_monitoring();
if(usb_detect() == USB_INSERTED)
usb_mode();
}
#endif /* HAVE_BOOTLOADER_USB_MODE */
/* Don't mount the disks yet, there could be file system/partition errors
which are fixable in USB mode */
reset_screen();
printf(MODEL_NAME" Rockbox Bootloader\n");