X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Farm%2Finclude%2Fasm%2Fsystem.h;h=9c3261c8847e9ef0c01a2e48c63f372ae86c2cc1;hb=fa1392a236dfebbe938a48f124c8332759aba8e5;hp=61e2914d44b44a1d3be2e92b74f52d6a2a765b12;hpb=6393c43c18a1aadcdcdd8551826eef15f50353d5;p=u-boot

diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index 61e2914d44..9c3261c884 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -1,6 +1,10 @@
 #ifndef __ASM_ARM_SYSTEM_H
 #define __ASM_ARM_SYSTEM_H
 
+#include <common.h>
+#include <linux/compiler.h>
+#include <asm/barriers.h>
+
 #ifdef CONFIG_ARM64
 
 /*
@@ -14,14 +18,111 @@
 #define CR_WXN		(1 << 19)	/* Write Permision Imply XN	*/
 #define CR_EE		(1 << 25)	/* Exception (Big) Endian	*/
 
-#define PGTABLE_SIZE	(0x10000)
+#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_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__
 
-#define isb()				\
-	({asm volatile(			\
-	"isb" : : : "memory");		\
-	})
+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(			\
@@ -65,20 +166,90 @@ static inline void set_sctlr(unsigned int val)
 	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);
 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);
 
-void armv8_switch_to_el2(void);
-void armv8_switch_to_el1(void);
+/*
+ * 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 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__ */
 
@@ -128,7 +299,11 @@ void flush_l3_cache(void);
 #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
@@ -142,7 +317,40 @@ void flush_l3_cache(void);
 
 #ifndef __ASSEMBLY__
 
-#define isb() __asm__ __volatile__ ("" : : : "memory")
+/**
+ * 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);
+
+#ifdef CONFIG_ARMV7_LPAE
+void switch_to_hypervisor_ret(void);
+#endif
 
 #define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
 
@@ -152,17 +360,50 @@ void flush_l3_cache(void);
 #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;
-	asm("mrc p15, 0, %0, c1, c0, 0	@ get CR" : "=r" (val) : : "cc");
+
+	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)
 {
-	asm volatile("mcr p15, 0, %0, c1, c0, 0	@ set CR"
-	  : : "r" (val) : "cc");
+	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();
 }
 
@@ -180,6 +421,75 @@ static inline void set_dacr(unsigned int val)
 	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_V7)
+/* 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,
+	DCACHE_WRITEALLOC = DCACHE_WRITEBACK | TTB_SECT_TEX(1),
+};
+#else
+#define TTB_SECT_AP		(3 << 10)
 /* options available for data cache on each page */
 enum dcache_option {
 	DCACHE_OFF = 0x12,
@@ -187,22 +497,31 @@ enum dcache_option {
 	DCACHE_WRITEBACK = 0x1e,
 	DCACHE_WRITEALLOC = 0x16,
 };
+#endif
 
 /* Size of an MMU section */
 enum {
-	MMU_SECTION_SHIFT	= 20,
+#ifdef CONFIG_ARMV7_LPAE
+	MMU_SECTION_SHIFT	= 21, /* 2MB */
+#else
+	MMU_SECTION_SHIFT	= 20, /* 1MB */
+#endif
 	MMU_SECTION_SIZE	= 1 << MMU_SECTION_SHIFT,
 };
 
-/**
- * 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_CPU_V7
+/* 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
@@ -220,4 +539,22 @@ void mmu_page_table_flush(unsigned long start, unsigned long stop);
 
 #endif /* CONFIG_ARM64 */
 
+#ifndef __ASSEMBLY__
+/**
+ * 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