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The cli()/sti() functions are not safe. We should have removed them long ago.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4314 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2004-02-25 13:00:36 +00:00
parent 34455abfe6
commit f9c780ccc1
6 changed files with 39 additions and 44 deletions
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29
firmware/export/system.h
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@ -23,6 +23,10 @@
#include "sh7034.h"
#include "config.h"
extern void system_reboot (void);
extern void system_init(void);
extern int set_irq_level(int level);
#define FREQ CPU_FREQ
#define BAUDRATE 9600
@ -113,47 +117,34 @@ static inline int tas (volatile int *pointer)
return result;
}
static inline void sti (void)
{
asm volatile ("ldc\t%0,sr" : : "r"(0<<4));
}
static inline void cli (void)
{
asm volatile ("ldc\t%0,sr" : : "r"(15<<4));
}
/* Compare And Swap */
static inline int cas (volatile int *pointer,int requested_value,int new_value)
{
cli();
unsigned int oldlevel = set_irq_level(15);
if (*pointer == requested_value)
{
*pointer = new_value;
sti ();
set_irq_level(oldlevel);
return 1;
}
sti ();
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)
{
cli();
unsigned int oldlevel = set_irq_level(15);
if (*pointer1 == requested_value1 && *pointer2 == requested_value2)
{
*pointer1 = new_value1;
*pointer2 = new_value2;
sti ();
set_irq_level(oldlevel);
return 1;
}
sti ();
set_irq_level(oldlevel);
return 0;
}
#endif
extern void system_reboot (void);
extern void system_init(void);
#endif