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Bootloader USB mode for PP502x. Enable only on GoGear SA9200 for the time being. Add HAVE_BOOTLOADER_USB_MODE to config if BOOTLOADER is defined to enable it. Clean up some kernel stuff a little to support it. Mess up a bunch of other stuff (hopefully not too badly).

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29053 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2011-01-15 08:19:30 +00:00
parent 53db95417d
commit 3a1127785b
26 changed files with 842 additions and 160 deletions
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36
firmware/kernel.c
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@ -48,10 +48,19 @@
#define KERNEL_ASSERT(exp, msg...) ({})
#endif
#if !defined(CPU_PP) || !defined(BOOTLOADER)
#if !defined(CPU_PP) || !defined(BOOTLOADER) || \
defined(HAVE_BOOTLOADER_USB_MODE)
volatile long current_tick SHAREDDATA_ATTR = 0;
#endif
/* Unless otherwise defined, do nothing */
#ifndef YIELD_KERNEL_HOOK
#define YIELD_KERNEL_HOOK() false
#endif
#ifndef SLEEP_KERNEL_HOOK
#define SLEEP_KERNEL_HOOK(ticks) false
#endif
/* List of tick tasks - final element always NULL for termination */
void (*tick_funcs[MAX_NUM_TICK_TASKS+1])(void);
@ -215,30 +224,25 @@ void timeout_register(struct timeout *tmo, timeout_cb_type callback,
****************************************************************************/
unsigned sleep(unsigned ticks)
{
#if defined(CPU_PP) && defined(BOOTLOADER)
unsigned stop = USEC_TIMER + ticks * (1000000/HZ);
while (TIME_BEFORE(USEC_TIMER, stop))
switch_thread();
#elif defined(CREATIVE_ZVx) && defined(BOOTLOADER)
/* hacky.. */
long sleep_ticks = current_tick + ticks + 1;
while (TIME_BEFORE(current_tick, sleep_ticks))
switch_thread();
#else
/* In certain situations, certain bootloaders in particular, a normal
* threading call is inappropriate. */
if (SLEEP_KERNEL_HOOK(ticks))
return 0; /* Handled */
disable_irq();
sleep_thread(ticks);
switch_thread();
#endif
return 0;
}
void yield(void)
{
#if ((defined(TATUNG_TPJ1022)) && defined(BOOTLOADER))
/* Some targets don't like yielding in the bootloader */
#else
/* In certain situations, certain bootloaders in particular, a normal
* threading call is inappropriate. */
if (YIELD_KERNEL_HOOK())
return; /* handled */
switch_thread();
#endif
}
/****************************************************************************