1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Common defines for v7m cpus
 4 */
 5#define V7M_SCS_ICTR			IOMEM(0xe000e004)
 6#define V7M_SCS_ICTR_INTLINESNUM_MASK		0x0000000f
 7
 8#define BASEADDR_V7M_SCB		IOMEM(0xe000ed00)
 9
10#define V7M_SCB_CPUID			0x00
11
12#define V7M_SCB_ICSR			0x04
13#define V7M_SCB_ICSR_PENDSVSET			(1 << 28)
14#define V7M_SCB_ICSR_PENDSVCLR			(1 << 27)
15#define V7M_SCB_ICSR_RETTOBASE			(1 << 11)
16
17#define V7M_SCB_VTOR			0x08
18
19#define V7M_SCB_AIRCR			0x0c
20#define V7M_SCB_AIRCR_VECTKEY			(0x05fa << 16)
21#define V7M_SCB_AIRCR_SYSRESETREQ		(1 << 2)
22
23#define V7M_SCB_SCR			0x10
24#define V7M_SCB_SCR_SLEEPDEEP			(1 << 2)
25
26#define V7M_SCB_CCR			0x14
27#define V7M_SCB_CCR_STKALIGN			(1 << 9)
28#define V7M_SCB_CCR_DC				(1 << 16)
29#define V7M_SCB_CCR_IC				(1 << 17)
30#define V7M_SCB_CCR_BP				(1 << 18)
31
32#define V7M_SCB_SHPR2			0x1c
33#define V7M_SCB_SHPR3			0x20
34
35#define V7M_SCB_SHCSR			0x24
36#define V7M_SCB_SHCSR_USGFAULTENA		(1 << 18)
37#define V7M_SCB_SHCSR_BUSFAULTENA		(1 << 17)
38#define V7M_SCB_SHCSR_MEMFAULTENA		(1 << 16)
39
40#define V7M_xPSR_FRAMEPTRALIGN			0x00000200
41#define V7M_xPSR_EXCEPTIONNO			0x000001ff
42
43/*
44 * When branching to an address that has bits [31:28] == 0xf an exception return
45 * occurs. Bits [27:5] are reserved (SBOP). If the processor implements the FP
46 * extension Bit [4] defines if the exception frame has space allocated for FP
47 * state information, SBOP otherwise. Bit [3] defines the mode that is returned
48 * to (0 -> handler mode; 1 -> thread mode). Bit [2] defines which sp is used
49 * (0 -> msp; 1 -> psp). Bits [1:0] are fixed to 0b01.
50 */
51#define EXC_RET_STACK_MASK			0x00000004
52#define EXC_RET_THREADMODE_PROCESSSTACK		0xfffffffd
53
54/* Cache related definitions */
55
56#define	V7M_SCB_CLIDR		0x78	/* Cache Level ID register */
57#define	V7M_SCB_CTR		0x7c	/* Cache Type register */
58#define	V7M_SCB_CCSIDR		0x80	/* Cache size ID register */
59#define	V7M_SCB_CSSELR		0x84	/* Cache size selection register */
60
61/* Memory-mapped MPU registers for M-class */
62#define MPU_TYPE		0x90
63#define MPU_CTRL		0x94
64#define MPU_CTRL_ENABLE		1
65#define MPU_CTRL_PRIVDEFENA	(1 << 2)
66
67#define MPU_RNR			0x98
68#define MPU_RBAR		0x9c
69#define MPU_RASR		0xa0
70
71/* Cache opeartions */
72#define	V7M_SCB_ICIALLU		0x250	/* I-cache invalidate all to PoU */
73#define	V7M_SCB_ICIMVAU		0x258	/* I-cache invalidate by MVA to PoU */
74#define	V7M_SCB_DCIMVAC		0x25c	/* D-cache invalidate by MVA to PoC */
75#define	V7M_SCB_DCISW		0x260	/* D-cache invalidate by set-way */
76#define	V7M_SCB_DCCMVAU		0x264	/* D-cache clean by MVA to PoU */
77#define	V7M_SCB_DCCMVAC		0x268	/* D-cache clean by MVA to PoC */
78#define	V7M_SCB_DCCSW		0x26c	/* D-cache clean by set-way */
79#define	V7M_SCB_DCCIMVAC	0x270	/* D-cache clean and invalidate by MVA to PoC */
80#define	V7M_SCB_DCCISW		0x274	/* D-cache clean and invalidate by set-way */
81#define	V7M_SCB_BPIALL		0x278	/* D-cache clean and invalidate by set-way */
82
83#ifndef __ASSEMBLY__
84
85enum reboot_mode;
86
87void armv7m_restart(enum reboot_mode mode, const char *cmd);
88
89#endif /* __ASSEMBLY__ */