| #ifndef __ASM_ARM_SYSTEM_H |
| #define __ASM_ARM_SYSTEM_H |
| |
| #include <common.h> |
| #include <linux/compiler.h> |
| #include <asm/barriers.h> |
| |
| #ifdef CONFIG_ARM64 |
| |
| /* |
| * SCTLR_EL1/SCTLR_EL2/SCTLR_EL3 bits definitions |
| */ |
| #define CR_M (1 << 0) /* MMU enable */ |
| #define CR_A (1 << 1) /* Alignment abort enable */ |
| #define CR_C (1 << 2) /* Dcache enable */ |
| #define CR_SA (1 << 3) /* Stack Alignment Check Enable */ |
| #define CR_I (1 << 12) /* Icache enable */ |
| #define CR_WXN (1 << 19) /* Write Permision Imply XN */ |
| #define CR_EE (1 << 25) /* Exception (Big) Endian */ |
| |
| #define ES_TO_AARCH64 1 |
| #define ES_TO_AARCH32 0 |
| |
| /* |
| * SCR_EL3 bits definitions |
| */ |
| #define SCR_EL3_RW_AARCH64 (1 << 10) /* Next lower level is AArch64 */ |
| #define SCR_EL3_RW_AARCH32 (0 << 10) /* Lower lowers level are AArch32 */ |
| #define SCR_EL3_HCE_EN (1 << 8) /* Hypervisor Call enable */ |
| #define SCR_EL3_SMD_DIS (1 << 7) /* Secure Monitor Call disable */ |
| #define SCR_EL3_RES1 (3 << 4) /* Reserved, RES1 */ |
| #define SCR_EL3_EA_EN (1 << 3) /* External aborts taken to EL3 */ |
| #define SCR_EL3_NS_EN (1 << 0) /* EL0 and EL1 in Non-scure state */ |
| |
| /* |
| * SPSR_EL3/SPSR_EL2 bits definitions |
| */ |
| #define SPSR_EL_END_LE (0 << 9) /* Exception Little-endian */ |
| #define SPSR_EL_DEBUG_MASK (1 << 9) /* Debug exception masked */ |
| #define SPSR_EL_ASYN_MASK (1 << 8) /* Asynchronous data abort masked */ |
| #define SPSR_EL_SERR_MASK (1 << 8) /* System Error exception masked */ |
| #define SPSR_EL_IRQ_MASK (1 << 7) /* IRQ exception masked */ |
| #define SPSR_EL_FIQ_MASK (1 << 6) /* FIQ exception masked */ |
| #define SPSR_EL_T_A32 (0 << 5) /* AArch32 instruction set A32 */ |
| #define SPSR_EL_M_AARCH64 (0 << 4) /* Exception taken from AArch64 */ |
| #define SPSR_EL_M_AARCH32 (1 << 4) /* Exception taken from AArch32 */ |
| #define SPSR_EL_M_SVC (0x3) /* Exception taken from SVC mode */ |
| #define SPSR_EL_M_HYP (0xa) /* Exception taken from HYP mode */ |
| #define SPSR_EL_M_EL1H (5) /* Exception taken from EL1h mode */ |
| #define SPSR_EL_M_EL2H (9) /* Exception taken from EL2h mode */ |
| |
| /* |
| * CPTR_EL2 bits definitions |
| */ |
| #define CPTR_EL2_RES1 (3 << 12 | 0x3ff) /* Reserved, RES1 */ |
| |
| /* |
| * SCTLR_EL2 bits definitions |
| */ |
| #define SCTLR_EL2_RES1 (3 << 28 | 3 << 22 | 1 << 18 | 1 << 16 |\ |
| 1 << 11 | 3 << 4) /* Reserved, RES1 */ |
| #define SCTLR_EL2_EE_LE (0 << 25) /* Exception Little-endian */ |
| #define SCTLR_EL2_WXN_DIS (0 << 19) /* Write permission is not XN */ |
| #define SCTLR_EL2_ICACHE_DIS (0 << 12) /* Instruction cache disabled */ |
| #define SCTLR_EL2_SA_DIS (0 << 3) /* Stack Alignment Check disabled */ |
| #define SCTLR_EL2_DCACHE_DIS (0 << 2) /* Data cache disabled */ |
| #define SCTLR_EL2_ALIGN_DIS (0 << 1) /* Alignment check disabled */ |
| #define SCTLR_EL2_MMU_DIS (0) /* MMU disabled */ |
| |
| /* |
| * CNTHCTL_EL2 bits definitions |
| */ |
| #define CNTHCTL_EL2_EL1PCEN_EN (1 << 1) /* Physical timer regs accessible */ |
| #define CNTHCTL_EL2_EL1PCTEN_EN (1 << 0) /* Physical counter accessible */ |
| |
| /* |
| * HCR_EL2 bits definitions |
| */ |
| #define HCR_EL2_RW_AARCH64 (1 << 31) /* EL1 is AArch64 */ |
| #define HCR_EL2_RW_AARCH32 (0 << 31) /* Lower levels are AArch32 */ |
| #define HCR_EL2_HCD_DIS (1 << 29) /* Hypervisor Call disabled */ |
| |
| /* |
| * CPACR_EL1 bits definitions |
| */ |
| #define CPACR_EL1_FPEN_EN (3 << 20) /* SIMD and FP instruction enabled */ |
| |
| /* |
| * SCTLR_EL1 bits definitions |
| */ |
| #define SCTLR_EL1_RES1 (3 << 28 | 3 << 22 | 1 << 20 |\ |
| 1 << 11) /* Reserved, RES1 */ |
| #define SCTLR_EL1_UCI_DIS (0 << 26) /* Cache instruction disabled */ |
| #define SCTLR_EL1_EE_LE (0 << 25) /* Exception Little-endian */ |
| #define SCTLR_EL1_WXN_DIS (0 << 19) /* Write permission is not XN */ |
| #define SCTLR_EL1_NTWE_DIS (0 << 18) /* WFE instruction disabled */ |
| #define SCTLR_EL1_NTWI_DIS (0 << 16) /* WFI instruction disabled */ |
| #define SCTLR_EL1_UCT_DIS (0 << 15) /* CTR_EL0 access disabled */ |
| #define SCTLR_EL1_DZE_DIS (0 << 14) /* DC ZVA instruction disabled */ |
| #define SCTLR_EL1_ICACHE_DIS (0 << 12) /* Instruction cache disabled */ |
| #define SCTLR_EL1_UMA_DIS (0 << 9) /* User Mask Access disabled */ |
| #define SCTLR_EL1_SED_EN (0 << 8) /* SETEND instruction enabled */ |
| #define SCTLR_EL1_ITD_EN (0 << 7) /* IT instruction enabled */ |
| #define SCTLR_EL1_CP15BEN_DIS (0 << 5) /* CP15 barrier operation disabled */ |
| #define SCTLR_EL1_SA0_DIS (0 << 4) /* Stack Alignment EL0 disabled */ |
| #define SCTLR_EL1_SA_DIS (0 << 3) /* Stack Alignment EL1 disabled */ |
| #define SCTLR_EL1_DCACHE_DIS (0 << 2) /* Data cache disabled */ |
| #define SCTLR_EL1_ALIGN_DIS (0 << 1) /* Alignment check disabled */ |
| #define SCTLR_EL1_MMU_DIS (0) /* MMU disabled */ |
| |
| #ifndef __ASSEMBLY__ |
| |
| u64 get_page_table_size(void); |
| #define PGTABLE_SIZE get_page_table_size() |
| |
| /* 2MB granularity */ |
| #define MMU_SECTION_SHIFT 21 |
| #define MMU_SECTION_SIZE (1 << MMU_SECTION_SHIFT) |
| |
| /* These constants need to be synced to the MT_ types in asm/armv8/mmu.h */ |
| enum dcache_option { |
| DCACHE_OFF = 0 << 2, |
| DCACHE_WRITETHROUGH = 3 << 2, |
| DCACHE_WRITEBACK = 4 << 2, |
| DCACHE_WRITEALLOC = 4 << 2, |
| }; |
| |
| #define wfi() \ |
| ({asm volatile( \ |
| "wfi" : : : "memory"); \ |
| }) |
| |
| static inline unsigned int current_el(void) |
| { |
| unsigned int el; |
| asm volatile("mrs %0, CurrentEL" : "=r" (el) : : "cc"); |
| return el >> 2; |
| } |
| |
| static inline unsigned int get_sctlr(void) |
| { |
| unsigned int el, val; |
| |
| el = current_el(); |
| if (el == 1) |
| asm volatile("mrs %0, sctlr_el1" : "=r" (val) : : "cc"); |
| else if (el == 2) |
| asm volatile("mrs %0, sctlr_el2" : "=r" (val) : : "cc"); |
| else |
| asm volatile("mrs %0, sctlr_el3" : "=r" (val) : : "cc"); |
| |
| return val; |
| } |
| |
| static inline void set_sctlr(unsigned int val) |
| { |
| unsigned int el; |
| |
| el = current_el(); |
| if (el == 1) |
| asm volatile("msr sctlr_el1, %0" : : "r" (val) : "cc"); |
| else if (el == 2) |
| asm volatile("msr sctlr_el2, %0" : : "r" (val) : "cc"); |
| else |
| asm volatile("msr sctlr_el3, %0" : : "r" (val) : "cc"); |
| |
| asm volatile("isb"); |
| } |
| |
| static inline unsigned long read_mpidr(void) |
| { |
| unsigned long val; |
| |
| asm volatile("mrs %0, mpidr_el1" : "=r" (val)); |
| |
| return val; |
| } |
| |
| #define BSP_COREID 0 |
| |
| void __asm_flush_dcache_all(void); |
| void __asm_invalidate_dcache_all(void); |
| void __asm_flush_dcache_range(u64 start, u64 end); |
| |
| /** |
| * __asm_invalidate_dcache_range() - Invalidate a range of virtual addresses |
| * |
| * This performance an invalidate from @start to @end - 1. Both addresses |
| * should be cache-aligned, otherwise this function will align the start |
| * address and may continue past the end address. |
| * |
| * Data in the address range is evicted from the cache and is not written back |
| * to memory. |
| * |
| * @start: Start address to invalidate |
| * @end: End address to invalidate up to (exclusive) |
| */ |
| void __asm_invalidate_dcache_range(u64 start, u64 end); |
| void __asm_invalidate_tlb_all(void); |
| void __asm_invalidate_icache_all(void); |
| int __asm_invalidate_l3_dcache(void); |
| int __asm_flush_l3_dcache(void); |
| int __asm_invalidate_l3_icache(void); |
| void __asm_switch_ttbr(u64 new_ttbr); |
| |
| /* |
| * Switch from EL3 to EL2 for ARMv8 |
| * |
| * @args: For loading 64-bit OS, fdt address. |
| * For loading 32-bit OS, zero. |
| * @mach_nr: For loading 64-bit OS, zero. |
| * For loading 32-bit OS, machine nr |
| * @fdt_addr: For loading 64-bit OS, zero. |
| * For loading 32-bit OS, fdt address. |
| * @arg4: Input argument. |
| * @entry_point: kernel entry point |
| * @es_flag: execution state flag, ES_TO_AARCH64 or ES_TO_AARCH32 |
| */ |
| void __noreturn armv8_switch_to_el2(u64 args, u64 mach_nr, u64 fdt_addr, |
| u64 arg4, u64 entry_point, u64 es_flag); |
| /* |
| * Switch from EL2 to EL1 for ARMv8 |
| * |
| * @args: For loading 64-bit OS, fdt address. |
| * For loading 32-bit OS, zero. |
| * @mach_nr: For loading 64-bit OS, zero. |
| * For loading 32-bit OS, machine nr |
| * @fdt_addr: For loading 64-bit OS, zero. |
| * For loading 32-bit OS, fdt address. |
| * @arg4: Input argument. |
| * @entry_point: kernel entry point |
| * @es_flag: execution state flag, ES_TO_AARCH64 or ES_TO_AARCH32 |
| */ |
| void armv8_switch_to_el1(u64 args, u64 mach_nr, u64 fdt_addr, |
| u64 arg4, u64 entry_point, u64 es_flag); |
| void armv8_el2_to_aarch32(u64 args, u64 mach_nr, u64 fdt_addr, |
| u64 arg4, u64 entry_point); |
| void gic_init(void); |
| void gic_send_sgi(unsigned long sgino); |
| void wait_for_wakeup(void); |
| void protect_secure_region(void); |
| void smp_kick_all_cpus(void); |
| |
| void flush_l3_cache(void); |
| void mmu_change_region_attr(phys_addr_t start, size_t size, u64 attrs); |
| |
| /* |
| *Issue a secure monitor call in accordance with ARM "SMC Calling convention", |
| * DEN0028A |
| * |
| * @args: input and output arguments |
| * |
| */ |
| void smc_call(struct pt_regs *args); |
| |
| void __noreturn psci_system_reset(void); |
| void __noreturn psci_system_off(void); |
| |
| #ifdef CONFIG_ARMV8_PSCI |
| extern char __secure_start[]; |
| extern char __secure_end[]; |
| extern char __secure_stack_start[]; |
| extern char __secure_stack_end[]; |
| |
| void armv8_setup_psci(void); |
| void psci_setup_vectors(void); |
| void psci_arch_init(void); |
| #endif |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #else /* CONFIG_ARM64 */ |
| |
| #ifdef __KERNEL__ |
| |
| #define CPU_ARCH_UNKNOWN 0 |
| #define CPU_ARCH_ARMv3 1 |
| #define CPU_ARCH_ARMv4 2 |
| #define CPU_ARCH_ARMv4T 3 |
| #define CPU_ARCH_ARMv5 4 |
| #define CPU_ARCH_ARMv5T 5 |
| #define CPU_ARCH_ARMv5TE 6 |
| #define CPU_ARCH_ARMv5TEJ 7 |
| #define CPU_ARCH_ARMv6 8 |
| #define CPU_ARCH_ARMv7 9 |
| |
| /* |
| * CR1 bits (CP#15 CR1) |
| */ |
| #define CR_M (1 << 0) /* MMU enable */ |
| #define CR_A (1 << 1) /* Alignment abort enable */ |
| #define CR_C (1 << 2) /* Dcache enable */ |
| #define CR_W (1 << 3) /* Write buffer enable */ |
| #define CR_P (1 << 4) /* 32-bit exception handler */ |
| #define CR_D (1 << 5) /* 32-bit data address range */ |
| #define CR_L (1 << 6) /* Implementation defined */ |
| #define CR_B (1 << 7) /* Big endian */ |
| #define CR_S (1 << 8) /* System MMU protection */ |
| #define CR_R (1 << 9) /* ROM MMU protection */ |
| #define CR_F (1 << 10) /* Implementation defined */ |
| #define CR_Z (1 << 11) /* Implementation defined */ |
| #define CR_I (1 << 12) /* Icache enable */ |
| #define CR_V (1 << 13) /* Vectors relocated to 0xffff0000 */ |
| #define CR_RR (1 << 14) /* Round Robin cache replacement */ |
| #define CR_L4 (1 << 15) /* LDR pc can set T bit */ |
| #define CR_DT (1 << 16) |
| #define CR_IT (1 << 18) |
| #define CR_ST (1 << 19) |
| #define CR_FI (1 << 21) /* Fast interrupt (lower latency mode) */ |
| #define CR_U (1 << 22) /* Unaligned access operation */ |
| #define CR_XP (1 << 23) /* Extended page tables */ |
| #define CR_VE (1 << 24) /* Vectored interrupts */ |
| #define CR_EE (1 << 25) /* Exception (Big) Endian */ |
| #define CR_TRE (1 << 28) /* TEX remap enable */ |
| #define CR_AFE (1 << 29) /* Access flag enable */ |
| #define CR_TE (1 << 30) /* Thumb exception enable */ |
| |
| #if defined(CONFIG_ARMV7_LPAE) && !defined(PGTABLE_SIZE) |
| #define PGTABLE_SIZE (4096 * 5) |
| #elif !defined(PGTABLE_SIZE) |
| #define PGTABLE_SIZE (4096 * 4) |
| #endif |
| |
| /* |
| * This is used to ensure the compiler did actually allocate the register we |
| * asked it for some inline assembly sequences. Apparently we can't trust |
| * the compiler from one version to another so a bit of paranoia won't hurt. |
| * This string is meant to be concatenated with the inline asm string and |
| * will cause compilation to stop on mismatch. |
| * (for details, see gcc PR 15089) |
| */ |
| #define __asmeq(x, y) ".ifnc " x "," y " ; .err ; .endif\n\t" |
| |
| #ifndef __ASSEMBLY__ |
| |
| #ifdef CONFIG_ARMV7_LPAE |
| void switch_to_hypervisor_ret(void); |
| #endif |
| |
| #define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t"); |
| |
| #ifdef __ARM_ARCH_7A__ |
| #define wfi() __asm__ __volatile__ ("wfi" : : : "memory") |
| #else |
| #define wfi() |
| #endif |
| |
| static inline unsigned long get_cpsr(void) |
| { |
| unsigned long cpsr; |
| |
| asm volatile("mrs %0, cpsr" : "=r"(cpsr): ); |
| return cpsr; |
| } |
| |
| static inline int is_hyp(void) |
| { |
| #ifdef CONFIG_ARMV7_LPAE |
| /* HYP mode requires LPAE ... */ |
| return ((get_cpsr() & 0x1f) == 0x1a); |
| #else |
| /* ... so without LPAE support we can optimize all hyp code away */ |
| return 0; |
| #endif |
| } |
| |
| static inline unsigned int get_cr(void) |
| { |
| unsigned int val; |
| |
| if (is_hyp()) |
| asm volatile("mrc p15, 4, %0, c1, c0, 0 @ get CR" : "=r" (val) |
| : |
| : "cc"); |
| else |
| asm volatile("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) |
| : |
| : "cc"); |
| return val; |
| } |
| |
| static inline void set_cr(unsigned int val) |
| { |
| if (is_hyp()) |
| asm volatile("mcr p15, 4, %0, c1, c0, 0 @ set CR" : |
| : "r" (val) |
| : "cc"); |
| else |
| asm volatile("mcr p15, 0, %0, c1, c0, 0 @ set CR" : |
| : "r" (val) |
| : "cc"); |
| isb(); |
| } |
| |
| static inline unsigned int get_dacr(void) |
| { |
| unsigned int val; |
| asm("mrc p15, 0, %0, c3, c0, 0 @ get DACR" : "=r" (val) : : "cc"); |
| return val; |
| } |
| |
| static inline void set_dacr(unsigned int val) |
| { |
| asm volatile("mcr p15, 0, %0, c3, c0, 0 @ set DACR" |
| : : "r" (val) : "cc"); |
| isb(); |
| } |
| |
| #ifdef CONFIG_ARMV7_LPAE |
| /* Long-Descriptor Translation Table Level 1/2 Bits */ |
| #define TTB_SECT_XN_MASK (1ULL << 54) |
| #define TTB_SECT_NG_MASK (1 << 11) |
| #define TTB_SECT_AF (1 << 10) |
| #define TTB_SECT_SH_MASK (3 << 8) |
| #define TTB_SECT_NS_MASK (1 << 5) |
| #define TTB_SECT_AP (1 << 6) |
| /* Note: TTB AP bits are set elsewhere */ |
| #define TTB_SECT_MAIR(x) ((x & 0x7) << 2) /* Index into MAIR */ |
| #define TTB_SECT (1 << 0) |
| #define TTB_PAGETABLE (3 << 0) |
| |
| /* TTBCR flags */ |
| #define TTBCR_EAE (1 << 31) |
| #define TTBCR_T0SZ(x) ((x) << 0) |
| #define TTBCR_T1SZ(x) ((x) << 16) |
| #define TTBCR_USING_TTBR0 (TTBCR_T0SZ(0) | TTBCR_T1SZ(0)) |
| #define TTBCR_IRGN0_NC (0 << 8) |
| #define TTBCR_IRGN0_WBWA (1 << 8) |
| #define TTBCR_IRGN0_WT (2 << 8) |
| #define TTBCR_IRGN0_WBNWA (3 << 8) |
| #define TTBCR_IRGN0_MASK (3 << 8) |
| #define TTBCR_ORGN0_NC (0 << 10) |
| #define TTBCR_ORGN0_WBWA (1 << 10) |
| #define TTBCR_ORGN0_WT (2 << 10) |
| #define TTBCR_ORGN0_WBNWA (3 << 10) |
| #define TTBCR_ORGN0_MASK (3 << 10) |
| #define TTBCR_SHARED_NON (0 << 12) |
| #define TTBCR_SHARED_OUTER (2 << 12) |
| #define TTBCR_SHARED_INNER (3 << 12) |
| #define TTBCR_EPD0 (0 << 7) |
| |
| /* |
| * Memory types |
| */ |
| #define MEMORY_ATTRIBUTES ((0x00 << (0 * 8)) | (0x88 << (1 * 8)) | \ |
| (0xcc << (2 * 8)) | (0xff << (3 * 8))) |
| |
| /* options available for data cache on each page */ |
| enum dcache_option { |
| DCACHE_OFF = TTB_SECT | TTB_SECT_MAIR(0) | TTB_SECT_XN_MASK, |
| DCACHE_WRITETHROUGH = TTB_SECT | TTB_SECT_MAIR(1), |
| DCACHE_WRITEBACK = TTB_SECT | TTB_SECT_MAIR(2), |
| DCACHE_WRITEALLOC = TTB_SECT | TTB_SECT_MAIR(3), |
| }; |
| #elif defined(CONFIG_CPU_V7A) |
| /* Short-Descriptor Translation Table Level 1 Bits */ |
| #define TTB_SECT_NS_MASK (1 << 19) |
| #define TTB_SECT_NG_MASK (1 << 17) |
| #define TTB_SECT_S_MASK (1 << 16) |
| /* Note: TTB AP bits are set elsewhere */ |
| #define TTB_SECT_AP (3 << 10) |
| #define TTB_SECT_TEX(x) ((x & 0x7) << 12) |
| #define TTB_SECT_DOMAIN(x) ((x & 0xf) << 5) |
| #define TTB_SECT_XN_MASK (1 << 4) |
| #define TTB_SECT_C_MASK (1 << 3) |
| #define TTB_SECT_B_MASK (1 << 2) |
| #define TTB_SECT (2 << 0) |
| |
| /* options available for data cache on each page */ |
| enum dcache_option { |
| DCACHE_OFF = TTB_SECT_DOMAIN(0) | TTB_SECT_XN_MASK | TTB_SECT, |
| DCACHE_WRITETHROUGH = DCACHE_OFF | TTB_SECT_C_MASK, |
| DCACHE_WRITEBACK = DCACHE_WRITETHROUGH | TTB_SECT_B_MASK, |
| #ifdef CONFIG_IMX_TRUSTY_OS |
| DCACHE_WRITEALLOC = DCACHE_WRITEBACK | TTB_SECT_TEX(1) | TTB_SECT_S_MASK, |
| #else |
| DCACHE_WRITEALLOC = DCACHE_WRITEBACK | TTB_SECT_TEX(1), |
| #endif |
| }; |
| #else |
| #define TTB_SECT_AP (3 << 10) |
| /* options available for data cache on each page */ |
| enum dcache_option { |
| DCACHE_OFF = 0x12, |
| DCACHE_WRITETHROUGH = 0x1a, |
| DCACHE_WRITEBACK = 0x1e, |
| DCACHE_WRITEALLOC = 0x16, |
| }; |
| #endif |
| |
| /* Size of an MMU section */ |
| enum { |
| #ifdef CONFIG_ARMV7_LPAE |
| MMU_SECTION_SHIFT = 21, /* 2MB */ |
| #else |
| MMU_SECTION_SHIFT = 20, /* 1MB */ |
| #endif |
| MMU_SECTION_SIZE = 1 << MMU_SECTION_SHIFT, |
| }; |
| |
| #ifdef CONFIG_CPU_V7A |
| /* TTBR0 bits */ |
| #define TTBR0_BASE_ADDR_MASK 0xFFFFC000 |
| #define TTBR0_RGN_NC (0 << 3) |
| #define TTBR0_RGN_WBWA (1 << 3) |
| #define TTBR0_RGN_WT (2 << 3) |
| #define TTBR0_RGN_WB (3 << 3) |
| /* TTBR0[6] is IRGN[0] and TTBR[0] is IRGN[1] */ |
| #define TTBR0_IRGN_NC (0 << 0 | 0 << 6) |
| #define TTBR0_IRGN_WBWA (0 << 0 | 1 << 6) |
| #define TTBR0_IRGN_WT (1 << 0 | 0 << 6) |
| #define TTBR0_IRGN_WB (1 << 0 | 1 << 6) |
| #endif |
| |
| /** |
| * Register an update to the page tables, and flush the TLB |
| * |
| * \param start start address of update in page table |
| * \param stop stop address of update in page table |
| */ |
| void mmu_page_table_flush(unsigned long start, unsigned long stop); |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #define arch_align_stack(x) (x) |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* CONFIG_ARM64 */ |
| |
| #ifndef __ASSEMBLY__ |
| /** |
| * save_boot_params() - Save boot parameters before starting reset sequence |
| * |
| * If you provide this function it will be called immediately U-Boot starts, |
| * both for SPL and U-Boot proper. |
| * |
| * All registers are unchanged from U-Boot entry. No registers need be |
| * preserved. |
| * |
| * This is not a normal C function. There is no stack. Return by branching to |
| * save_boot_params_ret. |
| * |
| * void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3); |
| */ |
| |
| /** |
| * save_boot_params_ret() - Return from save_boot_params() |
| * |
| * If you provide save_boot_params(), then you should jump back to this |
| * function when done. Try to preserve all registers. |
| * |
| * If your implementation of save_boot_params() is in C then it is acceptable |
| * to simply call save_boot_params_ret() at the end of your function. Since |
| * there is no link register set up, you cannot just exit the function. U-Boot |
| * will return to the (initialised) value of lr, and likely crash/hang. |
| * |
| * If your implementation of save_boot_params() is in assembler then you |
| * should use 'b' or 'bx' to return to save_boot_params_ret. |
| */ |
| void save_boot_params_ret(void); |
| |
| /** |
| * Change the cache settings for a region. |
| * |
| * \param start start address of memory region to change |
| * \param size size of memory region to change |
| * \param option dcache option to select |
| */ |
| void mmu_set_region_dcache_behaviour(phys_addr_t start, size_t size, |
| enum dcache_option option); |
| |
| #ifdef CONFIG_SYS_NONCACHED_MEMORY |
| void noncached_init(void); |
| phys_addr_t noncached_alloc(size_t size, size_t align); |
| #endif /* CONFIG_SYS_NONCACHED_MEMORY */ |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #endif |