xref: /openbmc/linux/arch/arm/include/asm/v7m.h (revision 52d24087)
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 #define V7M_SCB_ICSR_VECTACTIVE			0x000001ff
17 
18 #define V7M_SCB_VTOR			0x08
19 
20 #define V7M_SCB_AIRCR			0x0c
21 #define V7M_SCB_AIRCR_VECTKEY			(0x05fa << 16)
22 #define V7M_SCB_AIRCR_SYSRESETREQ		(1 << 2)
23 
24 #define V7M_SCB_SCR			0x10
25 #define V7M_SCB_SCR_SLEEPDEEP			(1 << 2)
26 
27 #define V7M_SCB_CCR			0x14
28 #define V7M_SCB_CCR_STKALIGN			(1 << 9)
29 #define V7M_SCB_CCR_DC				(1 << 16)
30 #define V7M_SCB_CCR_IC				(1 << 17)
31 #define V7M_SCB_CCR_BP				(1 << 18)
32 
33 #define V7M_SCB_SHPR2			0x1c
34 #define V7M_SCB_SHPR3			0x20
35 
36 #define V7M_SCB_SHCSR			0x24
37 #define V7M_SCB_SHCSR_USGFAULTENA		(1 << 18)
38 #define V7M_SCB_SHCSR_BUSFAULTENA		(1 << 17)
39 #define V7M_SCB_SHCSR_MEMFAULTENA		(1 << 16)
40 
41 #define V7M_xPSR_FRAMEPTRALIGN			0x00000200
42 #define V7M_xPSR_EXCEPTIONNO			V7M_SCB_ICSR_VECTACTIVE
43 
44 /*
45  * When branching to an address that has bits [31:28] == 0xf an exception return
46  * occurs. Bits [27:5] are reserved (SBOP). If the processor implements the FP
47  * extension Bit [4] defines if the exception frame has space allocated for FP
48  * state information, SBOP otherwise. Bit [3] defines the mode that is returned
49  * to (0 -> handler mode; 1 -> thread mode). Bit [2] defines which sp is used
50  * (0 -> msp; 1 -> psp). Bits [1:0] are fixed to 0b01.
51  */
52 #define EXC_RET_STACK_MASK			0x00000004
53 #define EXC_RET_THREADMODE_PROCESSSTACK		(3 << 2)
54 
55 /* Cache related definitions */
56 
57 #define	V7M_SCB_CLIDR		0x78	/* Cache Level ID register */
58 #define	V7M_SCB_CTR		0x7c	/* Cache Type register */
59 #define	V7M_SCB_CCSIDR		0x80	/* Cache size ID register */
60 #define	V7M_SCB_CSSELR		0x84	/* Cache size selection register */
61 
62 /* Memory-mapped MPU registers for M-class */
63 #define MPU_TYPE		0x90
64 #define MPU_CTRL		0x94
65 #define MPU_CTRL_ENABLE		1
66 #define MPU_CTRL_PRIVDEFENA	(1 << 2)
67 
68 #define PMSAv7_RNR		0x98
69 #define PMSAv7_RBAR		0x9c
70 #define PMSAv7_RASR		0xa0
71 
72 #define PMSAv8_RNR		0x98
73 #define PMSAv8_RBAR		0x9c
74 #define PMSAv8_RLAR		0xa0
75 #define PMSAv8_RBAR_A(n)	(PMSAv8_RBAR + 8*(n))
76 #define PMSAv8_RLAR_A(n)	(PMSAv8_RLAR + 8*(n))
77 #define PMSAv8_MAIR0		0xc0
78 #define PMSAv8_MAIR1		0xc4
79 
80 /* Cache opeartions */
81 #define	V7M_SCB_ICIALLU		0x250	/* I-cache invalidate all to PoU */
82 #define	V7M_SCB_ICIMVAU		0x258	/* I-cache invalidate by MVA to PoU */
83 #define	V7M_SCB_DCIMVAC		0x25c	/* D-cache invalidate by MVA to PoC */
84 #define	V7M_SCB_DCISW		0x260	/* D-cache invalidate by set-way */
85 #define	V7M_SCB_DCCMVAU		0x264	/* D-cache clean by MVA to PoU */
86 #define	V7M_SCB_DCCMVAC		0x268	/* D-cache clean by MVA to PoC */
87 #define	V7M_SCB_DCCSW		0x26c	/* D-cache clean by set-way */
88 #define	V7M_SCB_DCCIMVAC	0x270	/* D-cache clean and invalidate by MVA to PoC */
89 #define	V7M_SCB_DCCISW		0x274	/* D-cache clean and invalidate by set-way */
90 #define	V7M_SCB_BPIALL		0x278	/* D-cache clean and invalidate by set-way */
91 
92 #ifndef __ASSEMBLY__
93 
94 enum reboot_mode;
95 
96 void armv7m_restart(enum reboot_mode mode, const char *cmd);
97 
98 #endif /* __ASSEMBLY__ */
99