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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_ARM_CP15_H
#define __ASM_ARM_CP15_H
#include <asm/barrier.h>
/*
* 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)
#ifdef CONFIG_MMU
#define CR_HA (1 << 17) /* Hardware management of Access Flag */
#else
#define CR_BR (1 << 17) /* MPU Background region enable (PMSA) */
#endif
#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 */
#ifndef __ASSEMBLY__
#if __LINUX_ARM_ARCH__ >= 4
#define vectors_high() (get_cr() & CR_V)
#else
#define vectors_high() (0)
#endif
#ifdef CONFIG_CPU_CP15
#define __ACCESS_CP15(CRn, Op1, CRm, Op2) \
"mrc", "mcr", __stringify(p15, Op1, %0, CRn, CRm, Op2), u32
#define __ACCESS_CP15_64(Op1, CRm) \
"mrrc", "mcrr", __stringify(p15, Op1, %Q0, %R0, CRm), u64
#define __read_sysreg(r, w, c, t) ({ \
t __val; \
asm volatile(r " " c : "=r" (__val)); \
__val; \
})
#define read_sysreg(...) __read_sysreg(__VA_ARGS__)
#define __write_sysreg(v, r, w, c, t) asm volatile(w " " c : : "r" ((t)(v)))
#define write_sysreg(v, ...) __write_sysreg(v, __VA_ARGS__)
#define BPIALL __ACCESS_CP15(c7, 0, c5, 6)
#define ICIALLU __ACCESS_CP15(c7, 0, c5, 0)
extern unsigned long cr_alignment; /* defined in entry-armv.S */
static inline unsigned long get_cr(void)
{
unsigned long val;
asm("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc");
return val;
}
static inline void set_cr(unsigned long val)
{
asm volatile("mcr p15, 0, %0, c1, c0, 0 @ set CR"
: : "r" (val) : "cc");
isb();
}
static inline unsigned int get_auxcr(void)
{
unsigned int val;
asm("mrc p15, 0, %0, c1, c0, 1 @ get AUXCR" : "=r" (val));
return val;
}
static inline void set_auxcr(unsigned int val)
{
asm volatile("mcr p15, 0, %0, c1, c0, 1 @ set AUXCR"
: : "r" (val));
isb();
}
#define CPACC_FULL(n) (3 << (n * 2))
#define CPACC_SVC(n) (1 << (n * 2))
#define CPACC_DISABLE(n) (0 << (n * 2))
static inline unsigned int get_copro_access(void)
{
unsigned int val;
asm("mrc p15, 0, %0, c1, c0, 2 @ get copro access"
: "=r" (val) : : "cc");
return val;
}
static inline void set_copro_access(unsigned int val)
{
asm volatile("mcr p15, 0, %0, c1, c0, 2 @ set copro access"
: : "r" (val) : "cc");
isb();
}
#else /* ifdef CONFIG_CPU_CP15 */
/*
* cr_alignment is tightly coupled to cp15 (at least in the minds of the
* developers). Yielding 0 for machines without a cp15 (and making it
* read-only) is fine for most cases and saves quite some #ifdeffery.
*/
#define cr_alignment UL(0)
static inline unsigned long get_cr(void)
{
return 0;
}
#endif /* ifdef CONFIG_CPU_CP15 / else */
#endif /* ifndef __ASSEMBLY__ */
#endif
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