1/* SPDX-License-Identifier: GPL-2.0 */
 2/* Assembler variants of srmmu access functions.
 3 * Implemented in assembler to allow run-time patching.
 4 * LEON uses a different ASI for MMUREGS than SUN.
 5 *
 6 * The leon_1insn_patch infrastructure is used
 7 * for the run-time patching.
 8 */
 9
10#include <linux/linkage.h>
11
12#include <asm/asmmacro.h>
13#include <asm/pgtsrmmu.h>
14#include <asm/asi.h>
15
16/* unsigned int srmmu_get_mmureg(void) */
17ENTRY(srmmu_get_mmureg)
18LEON_PI(lda	[%g0] ASI_LEON_MMUREGS, %o0)
19SUN_PI_(lda	[%g0] ASI_M_MMUREGS, %o0)
20	retl
21	 nop
22ENDPROC(srmmu_get_mmureg)
23
24/* void srmmu_set_mmureg(unsigned long regval) */
25ENTRY(srmmu_set_mmureg)
26LEON_PI(sta	%o0, [%g0] ASI_LEON_MMUREGS)
27SUN_PI_(sta	%o0, [%g0] ASI_M_MMUREGS)
28	retl
29	 nop
30ENDPROC(srmmu_set_mmureg)
31
32/* void srmmu_set_ctable_ptr(unsigned long paddr) */
33ENTRY(srmmu_set_ctable_ptr)
34	/* paddr = ((paddr >> 4) & SRMMU_CTX_PMASK); */
35	srl	%o0, 4, %g1
36	and	%g1, SRMMU_CTX_PMASK, %g1
37
38	mov	SRMMU_CTXTBL_PTR, %g2
39LEON_PI(sta	%g1, [%g2] ASI_LEON_MMUREGS)
40SUN_PI_(sta	%g1, [%g2] ASI_M_MMUREGS)
41	retl
42	 nop
43ENDPROC(srmmu_set_ctable_ptr)
44
45
46/* void srmmu_set_context(int context) */
47ENTRY(srmmu_set_context)
48	mov	SRMMU_CTX_REG, %g1
49LEON_PI(sta	%o0, [%g1] ASI_LEON_MMUREGS)
50SUN_PI_(sta	%o0, [%g1] ASI_M_MMUREGS)
51	retl
52	 nop
53ENDPROC(srmmu_set_context)
54
55
56/* int srmmu_get_context(void) */
57ENTRY(srmmu_get_context)
58	mov	SRMMU_CTX_REG, %o0
59LEON_PI(lda     [%o0] ASI_LEON_MMUREGS, %o0)
60SUN_PI_(lda	[%o0] ASI_M_MMUREGS, %o0)
61	retl
62	 nop
63ENDPROC(srmmu_get_context)
64
65
66/* unsigned int srmmu_get_fstatus(void) */
67ENTRY(srmmu_get_fstatus)
68	mov	SRMMU_FAULT_STATUS, %o0
69LEON_PI(lda     [%o0] ASI_LEON_MMUREGS, %o0)
70SUN_PI_(lda	[%o0] ASI_M_MMUREGS, %o0)
71	retl
72	 nop
73ENDPROC(srmmu_get_fstatus)
74
75
76/* unsigned int srmmu_get_faddr(void) */
77ENTRY(srmmu_get_faddr)
78	mov	SRMMU_FAULT_ADDR, %o0
79LEON_PI(lda     [%o0] ASI_LEON_MMUREGS, %o0)
80SUN_PI_(lda	[%o0] ASI_M_MMUREGS, %o0)
81	retl
82	 nop
83ENDPROC(srmmu_get_faddr)

 
 1/* Assembler variants of srmmu access functions.
 2 * Implemented in assembler to allow run-time patching.
 3 * LEON uses a different ASI for MMUREGS than SUN.
 4 *
 5 * The leon_1insn_patch infrastructure is used
 6 * for the run-time patching.
 7 */
 8
 9#include <linux/linkage.h>
10
11#include <asm/asmmacro.h>
12#include <asm/pgtsrmmu.h>
13#include <asm/asi.h>
14
15/* unsigned int srmmu_get_mmureg(void) */
16ENTRY(srmmu_get_mmureg)
17LEON_PI(lda	[%g0] ASI_LEON_MMUREGS, %o0)
18SUN_PI_(lda	[%g0] ASI_M_MMUREGS, %o0)
19	retl
20	 nop
21ENDPROC(srmmu_get_mmureg)
22
23/* void srmmu_set_mmureg(unsigned long regval) */
24ENTRY(srmmu_set_mmureg)
25LEON_PI(sta	%o0, [%g0] ASI_LEON_MMUREGS)
26SUN_PI_(sta	%o0, [%g0] ASI_M_MMUREGS)
27	retl
28	 nop
29ENDPROC(srmmu_set_mmureg)
30
31/* void srmmu_set_ctable_ptr(unsigned long paddr) */
32ENTRY(srmmu_set_ctable_ptr)
33	/* paddr = ((paddr >> 4) & SRMMU_CTX_PMASK); */
34	srl	%o0, 4, %g1
35	and	%g1, SRMMU_CTX_PMASK, %g1
36
37	mov	SRMMU_CTXTBL_PTR, %g2
38LEON_PI(sta	%g1, [%g2] ASI_LEON_MMUREGS)
39SUN_PI_(sta	%g1, [%g2] ASI_M_MMUREGS)
40	retl
41	 nop
42ENDPROC(srmmu_set_ctable_ptr)
43
44
45/* void srmmu_set_context(int context) */
46ENTRY(srmmu_set_context)
47	mov	SRMMU_CTX_REG, %g1
48LEON_PI(sta	%o0, [%g1] ASI_LEON_MMUREGS)
49SUN_PI_(sta	%o0, [%g1] ASI_M_MMUREGS)
50	retl
51	 nop
52ENDPROC(srmmu_set_context)
53
54
55/* int srmmu_get_context(void) */
56ENTRY(srmmu_get_context)
57	mov	SRMMU_CTX_REG, %o0
58LEON_PI(lda     [%o0] ASI_LEON_MMUREGS, %o0)
59SUN_PI_(lda	[%o0] ASI_M_MMUREGS, %o0)
60	retl
61	 nop
62ENDPROC(srmmu_get_context)
63
64
65/* unsigned int srmmu_get_fstatus(void) */
66ENTRY(srmmu_get_fstatus)
67	mov	SRMMU_FAULT_STATUS, %o0
68LEON_PI(lda     [%o0] ASI_LEON_MMUREGS, %o0)
69SUN_PI_(lda	[%o0] ASI_M_MMUREGS, %o0)
70	retl
71	 nop
72ENDPROC(srmmu_get_fstatus)
73
74
75/* unsigned int srmmu_get_faddr(void) */
76ENTRY(srmmu_get_faddr)
77	mov	SRMMU_FAULT_ADDR, %o0
78LEON_PI(lda     [%o0] ASI_LEON_MMUREGS, %o0)
79SUN_PI_(lda	[%o0] ASI_M_MMUREGS, %o0)
80	retl
81	 nop
82ENDPROC(srmmu_get_faddr)