1 #ifndef __ASM_ARM_SYSTEM_H
2 #define __ASM_ARM_SYSTEM_H
7 * SCTLR_EL1/SCTLR_EL2/SCTLR_EL3 bits definitions
9 #define CR_M (1 << 0) /* MMU enable */
10 #define CR_A (1 << 1) /* Alignment abort enable */
11 #define CR_C (1 << 2) /* Dcache enable */
12 #define CR_SA (1 << 3) /* Stack Alignment Check Enable */
13 #define CR_I (1 << 12) /* Icache enable */
14 #define CR_WXN (1 << 19) /* Write Permision Imply XN */
15 #define CR_EE (1 << 25) /* Exception (Big) Endian */
17 #define PGTABLE_SIZE (0x10000)
19 #define MMU_SECTION_SHIFT 21
20 #define MMU_SECTION_SIZE (1 << MMU_SECTION_SHIFT)
30 "isb" : : : "memory"); \
35 "wfi" : : : "memory"); \
38 static inline unsigned int current_el(void)
41 asm volatile("mrs %0, CurrentEL" : "=r" (el) : : "cc");
45 static inline unsigned int get_sctlr(void)
51 asm volatile("mrs %0, sctlr_el1" : "=r" (val) : : "cc");
53 asm volatile("mrs %0, sctlr_el2" : "=r" (val) : : "cc");
55 asm volatile("mrs %0, sctlr_el3" : "=r" (val) : : "cc");
60 static inline void set_sctlr(unsigned int val)
66 asm volatile("msr sctlr_el1, %0" : : "r" (val) : "cc");
68 asm volatile("msr sctlr_el2, %0" : : "r" (val) : "cc");
70 asm volatile("msr sctlr_el3, %0" : : "r" (val) : "cc");
75 static inline unsigned long read_mpidr(void)
79 asm volatile("mrs %0, mpidr_el1" : "=r" (val));
86 void __asm_flush_dcache_all(void);
87 void __asm_invalidate_dcache_all(void);
88 void __asm_flush_dcache_range(u64 start, u64 end);
89 void __asm_invalidate_tlb_all(void);
90 void __asm_invalidate_icache_all(void);
91 int __asm_flush_l3_cache(void);
93 void armv8_switch_to_el2(void);
94 void armv8_switch_to_el1(void);
96 void gic_send_sgi(unsigned long sgino);
97 void wait_for_wakeup(void);
98 void protect_secure_region(void);
99 void smp_kick_all_cpus(void);
101 void flush_l3_cache(void);
103 #endif /* __ASSEMBLY__ */
105 #else /* CONFIG_ARM64 */
109 #define CPU_ARCH_UNKNOWN 0
110 #define CPU_ARCH_ARMv3 1
111 #define CPU_ARCH_ARMv4 2
112 #define CPU_ARCH_ARMv4T 3
113 #define CPU_ARCH_ARMv5 4
114 #define CPU_ARCH_ARMv5T 5
115 #define CPU_ARCH_ARMv5TE 6
116 #define CPU_ARCH_ARMv5TEJ 7
117 #define CPU_ARCH_ARMv6 8
118 #define CPU_ARCH_ARMv7 9
121 * CR1 bits (CP#15 CR1)
123 #define CR_M (1 << 0) /* MMU enable */
124 #define CR_A (1 << 1) /* Alignment abort enable */
125 #define CR_C (1 << 2) /* Dcache enable */
126 #define CR_W (1 << 3) /* Write buffer enable */
127 #define CR_P (1 << 4) /* 32-bit exception handler */
128 #define CR_D (1 << 5) /* 32-bit data address range */
129 #define CR_L (1 << 6) /* Implementation defined */
130 #define CR_B (1 << 7) /* Big endian */
131 #define CR_S (1 << 8) /* System MMU protection */
132 #define CR_R (1 << 9) /* ROM MMU protection */
133 #define CR_F (1 << 10) /* Implementation defined */
134 #define CR_Z (1 << 11) /* Implementation defined */
135 #define CR_I (1 << 12) /* Icache enable */
136 #define CR_V (1 << 13) /* Vectors relocated to 0xffff0000 */
137 #define CR_RR (1 << 14) /* Round Robin cache replacement */
138 #define CR_L4 (1 << 15) /* LDR pc can set T bit */
139 #define CR_DT (1 << 16)
140 #define CR_IT (1 << 18)
141 #define CR_ST (1 << 19)
142 #define CR_FI (1 << 21) /* Fast interrupt (lower latency mode) */
143 #define CR_U (1 << 22) /* Unaligned access operation */
144 #define CR_XP (1 << 23) /* Extended page tables */
145 #define CR_VE (1 << 24) /* Vectored interrupts */
146 #define CR_EE (1 << 25) /* Exception (Big) Endian */
147 #define CR_TRE (1 << 28) /* TEX remap enable */
148 #define CR_AFE (1 << 29) /* Access flag enable */
149 #define CR_TE (1 << 30) /* Thumb exception enable */
151 #define PGTABLE_SIZE (4096 * 4)
154 * This is used to ensure the compiler did actually allocate the register we
155 * asked it for some inline assembly sequences. Apparently we can't trust
156 * the compiler from one version to another so a bit of paranoia won't hurt.
157 * This string is meant to be concatenated with the inline asm string and
158 * will cause compilation to stop on mismatch.
159 * (for details, see gcc PR 15089)
161 #define __asmeq(x, y) ".ifnc " x "," y " ; .err ; .endif\n\t"
166 * save_boot_params() - Save boot parameters before starting reset sequence
168 * If you provide this function it will be called immediately U-Boot starts,
169 * both for SPL and U-Boot proper.
171 * All registers are unchanged from U-Boot entry. No registers need be
174 * This is not a normal C function. There is no stack. Return by branching to
175 * save_boot_params_ret.
177 * void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3);
181 * save_boot_params_ret() - Return from save_boot_params()
183 * If you provide save_boot_params(), then you should jump back to this
184 * function when done. Try to preserve all registers.
186 * If your implementation of save_boot_params() is in C then it is acceptable
187 * to simply call save_boot_params_ret() at the end of your function. Since
188 * there is no link register set up, you cannot just exit the function. U-Boot
189 * will return to the (initialised) value of lr, and likely crash/hang.
191 * If your implementation of save_boot_params() is in assembler then you
192 * should use 'b' or 'bx' to return to save_boot_params_ret.
194 void save_boot_params_ret(void);
196 #define isb() __asm__ __volatile__ ("" : : : "memory")
198 #define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
200 #ifdef __ARM_ARCH_7A__
201 #define wfi() __asm__ __volatile__ ("wfi" : : : "memory")
206 static inline unsigned int get_cr(void)
209 asm volatile("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc");
213 static inline void set_cr(unsigned int val)
215 asm volatile("mcr p15, 0, %0, c1, c0, 0 @ set CR"
216 : : "r" (val) : "cc");
220 static inline unsigned int get_dacr(void)
223 asm("mrc p15, 0, %0, c3, c0, 0 @ get DACR" : "=r" (val) : : "cc");
227 static inline void set_dacr(unsigned int val)
229 asm volatile("mcr p15, 0, %0, c3, c0, 0 @ set DACR"
230 : : "r" (val) : "cc");
235 /* Short-Descriptor Translation Table Level 1 Bits */
236 #define TTB_SECT_NS_MASK (1 << 19)
237 #define TTB_SECT_NG_MASK (1 << 17)
238 #define TTB_SECT_S_MASK (1 << 16)
239 /* Note: TTB AP bits are set elsewhere */
240 #define TTB_SECT_TEX(x) ((x & 0x7) << 12)
241 #define TTB_SECT_DOMAIN(x) ((x & 0xf) << 5)
242 #define TTB_SECT_XN_MASK (1 << 4)
243 #define TTB_SECT_C_MASK (1 << 3)
244 #define TTB_SECT_B_MASK (1 << 2)
245 #define TTB_SECT (2 << 0)
247 /* options available for data cache on each page */
249 DCACHE_OFF = TTB_SECT_S_MASK | TTB_SECT_DOMAIN(0) |
250 TTB_SECT_XN_MASK | TTB_SECT,
251 DCACHE_WRITETHROUGH = DCACHE_OFF | TTB_SECT_C_MASK,
252 DCACHE_WRITEBACK = DCACHE_WRITETHROUGH | TTB_SECT_B_MASK,
253 DCACHE_WRITEALLOC = DCACHE_WRITEBACK | TTB_SECT_TEX(1),
256 /* options available for data cache on each page */
259 DCACHE_WRITETHROUGH = 0x1a,
260 DCACHE_WRITEBACK = 0x1e,
261 DCACHE_WRITEALLOC = 0x16,
265 /* Size of an MMU section */
267 MMU_SECTION_SHIFT = 20,
268 MMU_SECTION_SIZE = 1 << MMU_SECTION_SHIFT,
273 #define TTBR0_BASE_ADDR_MASK 0xFFFFC000
274 #define TTBR0_RGN_NC (0 << 3)
275 #define TTBR0_RGN_WBWA (1 << 3)
276 #define TTBR0_RGN_WT (2 << 3)
277 #define TTBR0_RGN_WB (3 << 3)
278 /* TTBR0[6] is IRGN[0] and TTBR[0] is IRGN[1] */
279 #define TTBR0_IRGN_NC (0 << 0 | 0 << 6)
280 #define TTBR0_IRGN_WBWA (0 << 0 | 1 << 6)
281 #define TTBR0_IRGN_WT (1 << 0 | 0 << 6)
282 #define TTBR0_IRGN_WB (1 << 0 | 1 << 6)
286 * Register an update to the page tables, and flush the TLB
288 * \param start start address of update in page table
289 * \param stop stop address of update in page table
291 void mmu_page_table_flush(unsigned long start, unsigned long stop);
293 #endif /* __ASSEMBLY__ */
295 #define arch_align_stack(x) (x)
297 #endif /* __KERNEL__ */
299 #endif /* CONFIG_ARM64 */
303 * Change the cache settings for a region.
305 * \param start start address of memory region to change
306 * \param size size of memory region to change
307 * \param option dcache option to select
309 void mmu_set_region_dcache_behaviour(phys_addr_t start, size_t size,
310 enum dcache_option option);
312 #ifdef CONFIG_SYS_NONCACHED_MEMORY
313 void noncached_init(void);
314 phys_addr_t noncached_alloc(size_t size, size_t align);
315 #endif /* CONFIG_SYS_NONCACHED_MEMORY */
317 #endif /* __ASSEMBLY__ */