armv7.h
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
* Aneesh V <aneesh@ti.com>
*/
#ifndef ARMV7_H
#define ARMV7_H
/* Cortex-A9 revisions */
#define MIDR_CORTEX_A9_R0P1 0x410FC091
#define MIDR_CORTEX_A9_R1P2 0x411FC092
#define MIDR_CORTEX_A9_R1P3 0x411FC093
#define MIDR_CORTEX_A9_R2P10 0x412FC09A
/* Cortex-A15 revisions */
#define MIDR_CORTEX_A15_R0P0 0x410FC0F0
#define MIDR_CORTEX_A15_R2P2 0x412FC0F2
/* Cortex-A7 revisions */
#define MIDR_CORTEX_A7_R0P0 0x410FC070
#define MIDR_PRIMARY_PART_MASK 0xFF0FFFF0
/* ID_PFR1 feature fields */
#define CPUID_ARM_SEC_SHIFT 4
#define CPUID_ARM_SEC_MASK (0xF << CPUID_ARM_SEC_SHIFT)
#define CPUID_ARM_VIRT_SHIFT 12
#define CPUID_ARM_VIRT_MASK (0xF << CPUID_ARM_VIRT_SHIFT)
#define CPUID_ARM_GENTIMER_SHIFT 16
#define CPUID_ARM_GENTIMER_MASK (0xF << CPUID_ARM_GENTIMER_SHIFT)
/* valid bits in CBAR register / PERIPHBASE value */
#define CBAR_MASK 0xFFFF8000
/* CCSIDR */
#define CCSIDR_LINE_SIZE_OFFSET 0
#define CCSIDR_LINE_SIZE_MASK 0x7
#define CCSIDR_ASSOCIATIVITY_OFFSET 3
#define CCSIDR_ASSOCIATIVITY_MASK (0x3FF << 3)
#define CCSIDR_NUM_SETS_OFFSET 13
#define CCSIDR_NUM_SETS_MASK (0x7FFF << 13)
/*
* Values for InD field in CSSELR
* Selects the type of cache
*/
#define ARMV7_CSSELR_IND_DATA_UNIFIED 0
#define ARMV7_CSSELR_IND_INSTRUCTION 1
/* Values for Ctype fields in CLIDR */
#define ARMV7_CLIDR_CTYPE_NO_CACHE 0
#define ARMV7_CLIDR_CTYPE_INSTRUCTION_ONLY 1
#define ARMV7_CLIDR_CTYPE_DATA_ONLY 2
#define ARMV7_CLIDR_CTYPE_INSTRUCTION_DATA 3
#define ARMV7_CLIDR_CTYPE_UNIFIED 4
#ifndef __ASSEMBLY__
#include <linux/types.h>
#include <asm/io.h>
#include <asm/barriers.h>
/* read L2 control register (L2CTLR) */
static inline uint32_t read_l2ctlr(void)
{
uint32_t val = 0;
asm volatile ("mrc p15, 1, %0, c9, c0, 2" : "=r" (val));
return val;
}
/* write L2 control register (L2CTLR) */
static inline void write_l2ctlr(uint32_t val)
{
/*
* Note: L2CTLR can only be written when the L2 memory system
* is idle, ie before the MMU is enabled.
*/
asm volatile("mcr p15, 1, %0, c9, c0, 2" : : "r" (val) : "memory");
isb();
}
/*
* Workaround for ARM errata # 798870
* Set L2ACTLR[7] to reissue any memory transaction in the L2 that has been
* stalled for 1024 cycles to verify that its hazard condition still exists.
*/
static inline void v7_enable_l2_hazard_detect(void)
{
uint32_t val;
/* L2ACTLR[7]: Enable hazard detect timeout */
asm volatile ("mrc p15, 1, %0, c15, c0, 0\n\t" : "=r"(val));
val |= (1 << 7);
asm volatile ("mcr p15, 1, %0, c15, c0, 0\n\t" : : "r"(val));
}
/*
* Workaround for ARM errata # 799270
* Ensure that the L2 logic has been used within the previous 256 cycles
* before modifying the ACTLR.SMP bit. This is required during boot before
* MMU has been enabled, or during a specified reset or power down sequence.
*/
static inline void v7_enable_smp(uint32_t address)
{
uint32_t temp, val;
/* Read auxiliary control register */
asm volatile ("mrc p15, 0, %0, c1, c0, 1\n\t" : "=r"(val));
/* Enable SMP */
val |= (1 << 6);
/* Dummy read to assure L2 access */
temp = readl(address);
temp &= 0;
val |= temp;
/* Write auxiliary control register */
asm volatile ("mcr p15, 0, %0, c1, c0, 1\n\t" : : "r"(val));
CP15DSB;
CP15ISB;
}
void v7_en_l2_hazard_detect(void);
void v7_outer_cache_enable(void);
void v7_outer_cache_disable(void);
void v7_outer_cache_flush_all(void);
void v7_outer_cache_inval_all(void);
void v7_outer_cache_flush_range(u32 start, u32 end);
void v7_outer_cache_inval_range(u32 start, u32 end);
#ifdef CONFIG_ARMV7_NONSEC
int armv7_init_nonsec(void);
int armv7_apply_memory_carveout(u64 *start, u64 *size);
bool armv7_boot_nonsec(void);
/* defined in assembly file */
unsigned int _nonsec_init(void);
void _do_nonsec_entry(void *target_pc, unsigned long r0,
unsigned long r1, unsigned long r2);
void _smp_pen(void);
extern char __secure_start[];
extern char __secure_end[];
extern char __secure_stack_start[];
extern char __secure_stack_end[];
#endif /* CONFIG_ARMV7_NONSEC */
void v7_arch_cp15_set_l2aux_ctrl(u32 l2auxctrl, u32 cpu_midr,
u32 cpu_rev_comb, u32 cpu_variant,
u32 cpu_rev);
void v7_arch_cp15_set_acr(u32 acr, u32 cpu_midr, u32 cpu_rev_comb,
u32 cpu_variant, u32 cpu_rev);
#endif /* ! __ASSEMBLY__ */
#endif