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16bit read/write little endian

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This commit is contained in:
Michal Simek 2007-04-21 21:02:40 +02:00
parent 9d1d6a34d2
commit 0643631aa1
2 changed files with 37 additions and 0 deletions
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33
cpu/microblaze/start.S
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@ -117,3 +117,36 @@ clear_bss:
3: /* jumping to board_init */ 3: /* jumping to board_init */
brai board_init brai board_init
1: bri 1b 1: bri 1b
/*
* Read 16bit little endian
*/
.text
.global in16
.ent in16
.align 2
in16: lhu r3, r0, r5
bslli r4, r3, 8
bsrli r3, r3, 8
andi r4, r4, 0xffff
or r3, r3, r4
rtsd r15, 8
sext16 r3, r3
.end in16
/*
* Write 16bit little endian
* first parameter(r5) - address, second(r6) - short value
*/
.text
.global out16
.ent out16
.align 2
out16: bslli r3, r6, 8
bsrli r6, r6, 8
andi r3, r3, 0xffff
or r3, r3, r6
sh r3, r0, r5
rtsd r15, 8
or r0, r0, r0
.end out16

4
include/common.h
View file

@ -402,6 +402,10 @@ void ppcDcbi(unsigned long value);
void ppcSync(void); void ppcSync(void);
void ppcDcbz(unsigned long value); void ppcDcbz(unsigned long value);
#endif #endif
#if defined (CONFIG_MICROBLAZE)
unsigned short in16(unsigned int);
void out16(unsigned int, unsigned short value);
#endif
#if defined (CONFIG_MPC83XX) #if defined (CONFIG_MPC83XX)
void ppcDWload(unsigned int *addr, unsigned int *ret); void ppcDWload(unsigned int *addr, unsigned int *ret);