[mirror_edk2.git] / MdePkg / Library / BaseIoLibIntrinsic / Arm / ArmVirtMmio.asm

;\r
;  Copyright (c) 2014-2018, Linaro Limited. All rights reserved.\r
;\r
;  SPDX-License-Identifier: BSD-2-Clause-Patent\r
;\r
\r
\r
AREA IoLibMmio, CODE, READONLY\r
\r
EXPORT MmioRead8Internal\r
EXPORT MmioWrite8Internal\r
EXPORT MmioRead16Internal\r
EXPORT MmioWrite16Internal\r
EXPORT MmioRead32Internal\r
EXPORT MmioWrite32Internal\r
EXPORT MmioRead64Internal\r
EXPORT MmioWrite64Internal\r
\r
;\r
;  Reads an 8-bit MMIO register.\r
;\r
;  Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r
;  returned. This function must guarantee that all MMIO read and write\r
;  operations are serialized.\r
;\r
;  @param  Address The MMIO register to read.\r
;\r
;  @return The value read.\r
;\r
MmioRead8Internal\r
  ldrb    r0, [r0]\r
  dmb\r
  bx      lr\r
\r
;\r
;  Writes an 8-bit MMIO register.\r
;\r
;  Writes the 8-bit MMIO register specified by Address with the value specified\r
;  by Value and returns Value. This function must guarantee that all MMIO read\r
;  and write operations are serialized.\r
;\r
;  @param  Address The MMIO register to write.\r
;  @param  Value   The value to write to the MMIO register.\r
;\r
MmioWrite8Internal\r
  dmb     st\r
  strb    r1, [r0]\r
  bx      lr\r
\r
;\r
;  Reads a 16-bit MMIO register.\r
;\r
;  Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r
;  returned. This function must guarantee that all MMIO read and write\r
;  operations are serialized.\r
;\r
;  @param  Address The MMIO register to read.\r
;\r
;  @return The value read.\r
;\r
MmioRead16Internal\r
  ldrh    r0, [r0]\r
  dmb\r
  bx      lr\r
\r
;\r
;  Writes a 16-bit MMIO register.\r
;\r
;  Writes the 16-bit MMIO register specified by Address with the value specified\r
;  by Value and returns Value. This function must guarantee that all MMIO read\r
;  and write operations are serialized.\r
;\r
;  @param  Address The MMIO register to write.\r
;  @param  Value   The value to write to the MMIO register.\r
;\r
MmioWrite16Internal\r
  dmb     st\r
  strh    r1, [r0]\r
  bx      lr\r
\r
;\r
;  Reads a 32-bit MMIO register.\r
;\r
;  Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r
;  returned. This function must guarantee that all MMIO read and write\r
;  operations are serialized.\r
;\r
;  @param  Address The MMIO register to read.\r
;\r
;  @return The value read.\r
;\r
MmioRead32Internal\r
  ldr     r0, [r0]\r
  dmb\r
  bx      lr\r
\r
;\r
;  Writes a 32-bit MMIO register.\r
;\r
;  Writes the 32-bit MMIO register specified by Address with the value specified\r
;  by Value and returns Value. This function must guarantee that all MMIO read\r
;  and write operations are serialized.\r
;\r
;  @param  Address The MMIO register to write.\r
;  @param  Value   The value to write to the MMIO register.\r
;\r
MmioWrite32Internal\r
  dmb     st\r
  str     r1, [r0]\r
  bx      lr\r
\r
;\r
;  Reads a 64-bit MMIO register.\r
;\r
;  Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r
;  returned. This function must guarantee that all MMIO read and write\r
;  operations are serialized.\r
;\r
;  @param  Address The MMIO register to read.\r
;\r
;  @return The value read.\r
;\r
MmioRead64Internal\r
  ldr     r1, [r0, #4]\r
  ldr     r0, [r0]\r
  dmb\r
  bx      lr\r
\r
;\r
;  Writes a 64-bit MMIO register.\r
;\r
;  Writes the 64-bit MMIO register specified by Address with the value specified\r
;  by Value and returns Value. This function must guarantee that all MMIO read\r
;  and write operations are serialized.\r
;\r
;  @param  Address The MMIO register to write.\r
;  @param  Value   The value to write to the MMIO register.\r
;\r
MmioWrite64Internal\r
  dmb     st\r
  str     r2, [r0]\r
  str     r3, [r0, #4]\r
  bx      lr\r
\r
  END\r
Commit	Line	Data
9095d37b LG	1	;\r
	2	; Copyright (c) 2014-2018, Linaro Limited. All rights reserved.\r
	3	;\r
9344f092	4	; SPDX-License-Identifier: BSD-2-Clause-Patent\r
9095d37b LG	5	;\r
	6	\r
	7	\r
	8	AREA IoLibMmio, CODE, READONLY\r
	9	\r
	10	EXPORT MmioRead8Internal\r
	11	EXPORT MmioWrite8Internal\r
	12	EXPORT MmioRead16Internal\r
	13	EXPORT MmioWrite16Internal\r
	14	EXPORT MmioRead32Internal\r
	15	EXPORT MmioWrite32Internal\r
	16	EXPORT MmioRead64Internal\r
	17	EXPORT MmioWrite64Internal\r
	18	\r
	19	;\r
	20	; Reads an 8-bit MMIO register.\r
	21	;\r
	22	; Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r
	23	; returned. This function must guarantee that all MMIO read and write\r
	24	; operations are serialized.\r
	25	;\r
	26	; @param Address The MMIO register to read.\r
	27	;\r
	28	; @return The value read.\r
	29	;\r
	30	MmioRead8Internal\r
	31	ldrb r0, [r0]\r
	32	dmb\r
	33	bx lr\r
	34	\r
	35	;\r
	36	; Writes an 8-bit MMIO register.\r
	37	;\r
	38	; Writes the 8-bit MMIO register specified by Address with the value specified\r
	39	; by Value and returns Value. This function must guarantee that all MMIO read\r
	40	; and write operations are serialized.\r
	41	;\r
	42	; @param Address The MMIO register to write.\r
	43	; @param Value The value to write to the MMIO register.\r
	44	;\r
	45	MmioWrite8Internal\r
	46	dmb st\r
	47	strb r1, [r0]\r
	48	bx lr\r
	49	\r
	50	;\r
	51	; Reads a 16-bit MMIO register.\r
	52	;\r
	53	; Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r
	54	; returned. This function must guarantee that all MMIO read and write\r
	55	; operations are serialized.\r
	56	;\r
	57	; @param Address The MMIO register to read.\r
	58	;\r
	59	; @return The value read.\r
	60	;\r
	61	MmioRead16Internal\r
	62	ldrh r0, [r0]\r
	63	dmb\r
	64	bx lr\r
	65	\r
	66	;\r
	67	; Writes a 16-bit MMIO register.\r
	68	;\r
69	; Writes the 16-bit MMIO register specified by Address with the value specified\r
70	; by Value and returns Value. This function must guarantee that all MMIO read\r
71	; and write operations are serialized.\r
72	;\r
73	; @param Address The MMIO register to write.\r
74	; @param Value The value to write to the MMIO register.\r
75	;\r
76	MmioWrite16Internal\r
77	dmb st\r
78	strh r1, [r0]\r
79	bx lr\r
80	\r
81	;\r
82	; Reads a 32-bit MMIO register.\r
83	;\r
84	; Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r
85	; returned. This function must guarantee that all MMIO read and write\r
86	; operations are serialized.\r
87	;\r
88	; @param Address The MMIO register to read.\r
89	;\r
90	; @return The value read.\r
91	;\r
92	MmioRead32Internal\r
93	ldr r0, [r0]\r
94	dmb\r
95	bx lr\r
96	\r
97	;\r
98	; Writes a 32-bit MMIO register.\r
99	;\r
100	; Writes the 32-bit MMIO register specified by Address with the value specified\r
101	; by Value and returns Value. This function must guarantee that all MMIO read\r
102	; and write operations are serialized.\r
103	;\r
104	; @param Address The MMIO register to write.\r
105	; @param Value The value to write to the MMIO register.\r
106	;\r
107	MmioWrite32Internal\r
108	dmb st\r
109	str r1, [r0]\r
110	bx lr\r
111	\r
112	;\r
113	; Reads a 64-bit MMIO register.\r
114	;\r
115	; Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r
116	; returned. This function must guarantee that all MMIO read and write\r
117	; operations are serialized.\r
118	;\r
119	; @param Address The MMIO register to read.\r
120	;\r
121	; @return The value read.\r
122	;\r
123	MmioRead64Internal\r
9cabe9d4 AB	124	ldr r1, [r0, #4]\r
9cabe9d4 AB	125	ldr r0, [r0]\r
9095d37b LG	126	dmb\r
	127	bx lr\r
	128	\r
	129	;\r
	130	; Writes a 64-bit MMIO register.\r
	131	;\r
	132	; Writes the 64-bit MMIO register specified by Address with the value specified\r
	133	; by Value and returns Value. This function must guarantee that all MMIO read\r
	134	; and write operations are serialized.\r
	135	;\r
	136	; @param Address The MMIO register to write.\r
	137	; @param Value The value to write to the MMIO register.\r
	138	;\r
	139	MmioWrite64Internal\r
	140	dmb st\r
9cabe9d4 AB	141	str r2, [r0]\r
9cabe9d4 AB	142	str r3, [r0, #4]\r
9095d37b LG	143	bx lr\r
	144	\r
	145	END\r