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AVR32: Resource management rewrite

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Rewrite the resource management code (i.e. I/O memory, clock gating,
gpio) so it doesn't depend on any global state. This is necessary
because this code is heavily used before relocation to RAM, so we
can't write to any global variables.

As an added bonus, this makes u-boot's memory footprint a bit smaller,
although some functionality has been left out; all clocks are enabled
all the time, and there's no checking for gpio line conflicts.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This commit is contained in:
Haavard Skinnemoen
2006-11-19 18:06:53 +01:00
parent 03d1e13657
commit df548d3c3e
26 changed files with 522 additions and 1039 deletions
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11
cpu/at32ap/interrupts.c
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@@ -27,7 +27,7 @@
#include <asm/processor.h>
#include <asm/sysreg.h>
#include <asm/arch/platform.h>
#include <asm/arch/memory-map.h>
#define HANDLER_MASK 0x00ffffff
#define INTLEV_SHIFT 30
@@ -44,8 +44,6 @@ volatile unsigned long timer_overflow;
*/
static unsigned long tb_factor;
static const struct device *intc_dev;
unsigned long get_tbclk(void)
{
return gd->cpu_hz;
@@ -126,7 +124,7 @@ static int set_interrupt_handler(unsigned int nr, void (*handler)(void),
intpr = (handler_addr & HANDLER_MASK);
intpr |= (priority & INTLEV_MASK) << INTLEV_SHIFT;
writel(intpr, intc_dev->regs + 4 * nr);
writel(intpr, (void *)INTC_BASE + 4 * nr);
return 0;
}
@@ -143,10 +141,7 @@ void timer_init(void)
do_div(tmp, gd->cpu_hz);
tb_factor = (u32)tmp;
intc_dev = get_device(DEVICE_INTC);
if (!intc_dev
|| set_interrupt_handler(0, &timer_interrupt_handler, 3))
if (set_interrupt_handler(0, &timer_interrupt_handler, 3))
return;
/* For all practical purposes, this gives us an overflow interrupt */