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Add ARMv4 16-bit(set, mod, clr) operations used on DM320.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29221 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Karl Kurbjun 2011-02-06 19:43:45 +00:00
parent 50c547c640
commit 8e8f700842
3 changed files with 67 additions and 0 deletions
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4
firmware/export/system.h
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@ -152,6 +152,10 @@ uint32_t isolate_first_bit(uint32_t val)
{ return val & -val; }
/* Functions to set and clear register or variable bits atomically */
void bitmod16(volatile uint16_t *addr, uint16_t bits, uint16_t mask);
void bitset16(volatile uint16_t *addr, uint16_t mask);
void bitclr16(volatile uint16_t *addr, uint16_t mask);
void bitmod32(volatile uint32_t *addr, uint32_t bits, uint32_t mask);
void bitset32(volatile uint32_t *addr, uint32_t mask);
void bitclr32(volatile uint32_t *addr, uint32_t mask);