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Cleaned up and started porting to Coldfire

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5284 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2004-10-15 11:32:58 +00:00
parent 688b4ddec6
commit 82fb2ace77
1 changed files with 16 additions and 36 deletions
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52
firmware/export/system.h
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@ -56,6 +56,7 @@ extern void system_init(void);
#define I_CONSTRAINT "I"
#endif
#if CONFIG_CPU == SH7034
#define or_b(mask, address) \
asm \
("or.b\t%0,@(r0,gbr)" \
@ -76,6 +77,7 @@ extern void system_init(void);
: \
: /* %0 */ I_CONSTRAINT((char)(mask)), \
/* %1 */ "z"(address-GBR))
#endif
#ifndef SIMULATOR
@ -83,6 +85,7 @@ extern void system_init(void);
* Interrupt level setting
* The level is left shifted 4 bits
****************************************************************************/
#if CONFIG_CPU == SH7034
#define HIGHEST_IRQ_LEVEL (15<<4)
static inline int set_irq_level(int level)
{
@ -129,42 +132,6 @@ static inline unsigned long SWAB32(unsigned long value)
return value;
}
/* Test And Set - UNTESTED */
static inline int tas (volatile int *pointer)
{
int result;
asm volatile ("tas.b\t@%1;movt\t%0" : "=t"(result) : "r"((char *)pointer) : "memory");
return result;
}
/* Compare And Swap */
static inline int cas (volatile int *pointer,int requested_value,int new_value)
{
unsigned int oldlevel = set_irq_level(HIGHEST_IRQ_LEVEL);
if (*pointer == requested_value)
{
*pointer = new_value;
set_irq_level(oldlevel);
return 1;
}
set_irq_level(oldlevel);
return 0;
}
static inline int cas2 (volatile int *pointer1,volatile int *pointer2,int requested_value1,int requested_value2,int new_value1,int new_value2)
{
unsigned int oldlevel = set_irq_level(HIGHEST_IRQ_LEVEL);
if (*pointer1 == requested_value1 && *pointer2 == requested_value2)
{
*pointer1 = new_value1;
*pointer2 = new_value2;
set_irq_level(oldlevel);
return 1;
}
set_irq_level(oldlevel);
return 0;
}
/* Utilize the user break controller to catch invalid memory accesses. */
int system_memory_guard(int newmode);
@ -176,6 +143,19 @@ enum {
MAXMEMGUARD
};
#elif CONFIG_CPU == MCF5249
#define HIGHEST_IRQ_LEVEL (7<<8)
static inline int set_irq_level(int level)
{
int i;
/* Read the old level and set the new one */
asm volatile ("move.w %%sr,%0\n"
"or.l #0x2000,%1\n"
"move.w %1,%%sr\n" : "=r" (i) : "r" (level));
return i;
}
#endif
#endif
#endif