mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
6729cf7967
LEON uses a different ASI than SUN for MMUREGS Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Daniel Hellstrom <daniel@gaisler.com> Cc: Konrad Eisele <konrad@gaisler.com>
83 lines
1.9 KiB
ArmAsm
83 lines
1.9 KiB
ArmAsm
/* Assembler variants of srmmu access functions.
|
|
* Implemented in assembler to allow run-time patching.
|
|
* LEON uses a different ASI for MMUREGS than SUN.
|
|
*
|
|
* The leon_1insn_patch infrastructure is used
|
|
* for the run-time patching.
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
#include <asm/asmmacro.h>
|
|
#include <asm/pgtsrmmu.h>
|
|
#include <asm/asi.h>
|
|
|
|
/* unsigned int srmmu_get_mmureg(void) */
|
|
ENTRY(srmmu_get_mmureg)
|
|
LEON_PI(lda [%g0] ASI_LEON_MMUREGS, %o0)
|
|
SUN_PI_(lda [%g0] ASI_M_MMUREGS, %o0)
|
|
retl
|
|
nop
|
|
ENDPROC(srmmu_get_mmureg)
|
|
|
|
/* void srmmu_set_mmureg(unsigned long regval) */
|
|
ENTRY(srmmu_set_mmureg)
|
|
LEON_PI(sta %o0, [%g0] ASI_LEON_MMUREGS)
|
|
SUN_PI_(sta %o0, [%g0] ASI_M_MMUREGS)
|
|
retl
|
|
nop
|
|
ENDPROC(srmmu_set_mmureg)
|
|
|
|
/* void srmmu_set_ctable_ptr(unsigned long paddr) */
|
|
ENTRY(srmmu_set_ctable_ptr)
|
|
/* paddr = ((paddr >> 4) & SRMMU_CTX_PMASK); */
|
|
srl %o0, 4, %g1
|
|
and %g1, SRMMU_CTX_PMASK, %g1
|
|
|
|
mov SRMMU_CTXTBL_PTR, %g2
|
|
LEON_PI(sta %g1, [%g2] ASI_LEON_MMUREGS)
|
|
SUN_PI_(sta %g1, [%g2] ASI_M_MMUREGS)
|
|
retl
|
|
nop
|
|
ENDPROC(srmmu_set_ctable_ptr)
|
|
|
|
|
|
/* void srmmu_set_context(int context) */
|
|
ENTRY(srmmu_set_context)
|
|
mov SRMMU_CTX_REG, %g1
|
|
LEON_PI(sta %o0, [%g1] ASI_LEON_MMUREGS)
|
|
SUN_PI_(sta %o0, [%g1] ASI_M_MMUREGS)
|
|
retl
|
|
nop
|
|
ENDPROC(srmmu_set_context)
|
|
|
|
|
|
/* int srmmu_get_context(void) */
|
|
ENTRY(srmmu_get_context)
|
|
mov SRMMU_CTX_REG, %o0
|
|
LEON_PI(lda [%o0] ASI_LEON_MMUREGS, %o0)
|
|
SUN_PI_(lda [%o0] ASI_M_MMUREGS, %o0)
|
|
retl
|
|
nop
|
|
ENDPROC(srmmu_get_context)
|
|
|
|
|
|
/* unsigned int srmmu_get_fstatus(void) */
|
|
ENTRY(srmmu_get_fstatus)
|
|
mov SRMMU_FAULT_STATUS, %o0
|
|
LEON_PI(lda [%o0] ASI_LEON_MMUREGS, %o0)
|
|
SUN_PI_(lda [%o0] ASI_M_MMUREGS, %o0)
|
|
retl
|
|
nop
|
|
ENDPROC(srmmu_get_fstatus)
|
|
|
|
|
|
/* unsigned int srmmu_get_faddr(void) */
|
|
ENTRY(srmmu_get_faddr)
|
|
mov SRMMU_FAULT_ADDR, %o0
|
|
LEON_PI(lda [%o0] ASI_LEON_MMUREGS, %o0)
|
|
SUN_PI_(lda [%o0] ASI_M_MMUREGS, %o0)
|
|
retl
|
|
nop
|
|
ENDPROC(srmmu_get_faddr)
|