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/* FIXME(dhendrix): This is split out from asm/system.h. */
#ifndef SYSTEM_H_
#define SYSTEM_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)
#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 */
/*
* 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"
#define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
#define arch_align_stack(x) (x)
#ifndef __ASSEMBLER__
#include <arch/cache.h> /* for isb() */
static inline unsigned int get_cr(void)
{
unsigned int val;
asm("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");
isb();
}
/* options available for data cache on each page */
enum dcache_option {
DCACHE_OFF,
DCACHE_WRITETHROUGH,
DCACHE_WRITEBACK,
};
/* Size of an MMU section */
enum {
MMU_SECTION_SHIFT = 20,
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(unsigned long start, int size,
enum dcache_option option);
/**
* 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);
void mmu_setup(unsigned long start, unsigned long size);
void v7_inval_tlb(void);
void arm_init_before_mmu(void);
/*
* FIXME: sdelay originally came from arch/arm/cpu/armv7/exynos5/setup.h in
* u-boot but does not seem specific to exynos5...
*/
void sdelay(unsigned long loops);
#endif // __ASSEMBLY__
#endif /* SYSTEM_H_ */
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