xref: /netbsd-src/sys/arch/arm/include/arm32/machdep.h (revision e65a0eaa66f2baacfbf4ae60f2f7b641eb98db8d)
1 /* $NetBSD: machdep.h,v 1.36 2022/04/02 11:16:07 skrll Exp $ */
2 
3 #ifndef _ARM32_MACHDEP_H_
4 #define _ARM32_MACHDEP_H_
5 
6 #ifdef _KERNEL
7 
8 #define INIT_ARM_STACK_SHIFT	12
9 #define INIT_ARM_STACK_SIZE	(1 << INIT_ARM_STACK_SHIFT)
10 #define INIT_ARM_TOTAL_STACK	(INIT_ARM_STACK_SIZE * MAXCPUS)
11 
12 /* Define various stack sizes in pages */
13 #ifndef IRQ_STACK_SIZE
14 #define IRQ_STACK_SIZE	1
15 #endif
16 #ifndef ABT_STACK_SIZE
17 #define ABT_STACK_SIZE	1
18 #endif
19 #ifndef UND_STACK_SIZE
20 #define UND_STACK_SIZE	1
21 #endif
22 #ifndef FIQ_STACK_SIZE
23 #define FIQ_STACK_SIZE	1
24 #endif
25 
26 extern void (*cpu_reset_address)(void);
27 extern paddr_t cpu_reset_address_paddr;
28 
29 extern void (*cpu_powerdown_address)(void);
30 
31 extern u_int data_abort_handler_address;
32 extern u_int prefetch_abort_handler_address;
33 // extern u_int undefined_handler_address;
34 #define	undefined_handler_address (curcpu()->ci_undefsave[2])
35 
36 struct bootmem_info {
37 	paddr_t bmi_start;
38 	paddr_t bmi_kernelstart;
39 	paddr_t bmi_kernelend;
40 	paddr_t bmi_end;
41 	pv_addrqh_t bmi_freechunks;
42 	pv_addrqh_t bmi_chunks;		/* sorted list of memory to be mapped */
43 	pv_addr_t bmi_freeblocks[4];
44 	/*
45 	 * These need to be static for pmap's kernel_pt list.
46 	 */
47 	pv_addr_t bmi_vector_l2pt;
48 	pv_addr_t bmi_io_l2pt;
49 	pv_addr_t bmi_l2pts[32];	// for large memory disks.
50 	u_int bmi_freepages;
51 	u_int bmi_nfreeblocks;
52 };
53 
54 extern struct bootmem_info bootmem_info;
55 
56 extern char *booted_kernel;
57 extern u_long kern_vtopdiff;
58 
59 /* misc prototypes used by the many arm machdeps */
60 void cortex_pmc_ccnt_init(void);
61 void cpu_hatch(struct cpu_info *, u_int, void (*)(struct cpu_info *));
62 void halt(void);
63 void parse_mi_bootargs(char *);
64 void data_abort_handler(trapframe_t *);
65 void prefetch_abort_handler(trapframe_t *);
66 void undefinedinstruction_bounce(trapframe_t *);
67 void dumpsys(void);
68 
69 /*
70  * note that we use void * as all the platforms have different ideas on what
71  * the structure is
72  */
73 vaddr_t initarm(void *);
74 struct pmap_devmap;
75 struct boot_physmem;
76 
77 void cpu_startup_hook(void);
78 void cpu_startup_default(void);
79 
80 static inline paddr_t
aarch32_kern_vtophys(vaddr_t va)81 aarch32_kern_vtophys(vaddr_t va)
82 {
83 	return va - kern_vtopdiff;
84 }
85 
86 static inline vaddr_t
aarch32_kern_phystov(paddr_t pa)87 aarch32_kern_phystov(paddr_t pa)
88 {
89 	return pa + kern_vtopdiff;
90 }
91 
92 #define KERN_VTOPHYS(va)	aarch32_kern_vtophys(va)
93 #define KERN_PHYSTOV(pa)	aarch32_kern_phystov(pa)
94 
95 void cpu_kernel_vm_init(paddr_t, psize_t);
96 
97 void arm32_bootmem_init(paddr_t memstart, psize_t memsize, paddr_t kernelstart);
98 void arm32_kernel_vm_init(vaddr_t kvm_base, vaddr_t vectors,
99 	vaddr_t iovbase /* (can be zero) */,
100 	const struct pmap_devmap *devmap, bool mapallmem_p);
101 vaddr_t initarm_common(vaddr_t kvm_base, vsize_t kvm_size,
102         const struct boot_physmem *bp, size_t nbp);
103 
104 void uartputc(int);
105 
106 /* from arm/arm32/intr.c */
107 void dosoftints(void);
108 void set_spl_masks(void);
109 #ifdef DIAGNOSTIC
110 void dump_spl_masks(void);
111 #endif
112 
113 /* cpu_onfault */
114 int cpu_set_onfault(struct faultbuf *) __returns_twice;
115 void cpu_jump_onfault(struct trapframe *, const struct faultbuf *, int);
116 
117 static inline void
cpu_unset_onfault(void)118 cpu_unset_onfault(void)
119 {
120 	curpcb->pcb_onfault = NULL;
121 }
122 
123 static inline void
cpu_enable_onfault(struct faultbuf * fb)124 cpu_enable_onfault(struct faultbuf *fb)
125 {
126 	curpcb->pcb_onfault = fb;
127 }
128 
129 static inline struct faultbuf *
cpu_disable_onfault(void)130 cpu_disable_onfault(void)
131 {
132 	struct faultbuf * const fb = curpcb->pcb_onfault;
133 	if (fb != NULL)
134 		curpcb->pcb_onfault = NULL;
135 	return fb;
136 }
137 
138 #endif	/* _KERNEL */
139 
140 #endif	/* _ARM32_MACHDEP_H_ */
141