2f25d9963e
We moved to using __ASSEMBLER__ years ago since it is set by as. Change-Id: I60103ba23ebe87be1d0bc63beed0ef5b05eed4f2 Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/2111 Reviewed-by: Ronald G. Minnich <rminnich@gmail.com> Tested-by: build bot (Jenkins)
124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
/* FIXME(dhendrix): This is split out from asm/system.h. */
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#ifndef SYSTEM_H_
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#define SYSTEM_H_
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#define CPU_ARCH_UNKNOWN 0
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#define CPU_ARCH_ARMv3 1
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#define CPU_ARCH_ARMv4 2
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#define CPU_ARCH_ARMv4T 3
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#define CPU_ARCH_ARMv5 4
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#define CPU_ARCH_ARMv5T 5
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#define CPU_ARCH_ARMv5TE 6
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#define CPU_ARCH_ARMv5TEJ 7
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#define CPU_ARCH_ARMv6 8
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#define CPU_ARCH_ARMv7 9
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/*
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* CR1 bits (CP#15 CR1)
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*/
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#define CR_M (1 << 0) /* MMU enable */
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#define CR_A (1 << 1) /* Alignment abort enable */
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#define CR_C (1 << 2) /* Dcache enable */
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#define CR_W (1 << 3) /* Write buffer enable */
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#define CR_P (1 << 4) /* 32-bit exception handler */
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#define CR_D (1 << 5) /* 32-bit data address range */
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#define CR_L (1 << 6) /* Implementation defined */
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#define CR_B (1 << 7) /* Big endian */
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#define CR_S (1 << 8) /* System MMU protection */
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#define CR_R (1 << 9) /* ROM MMU protection */
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#define CR_F (1 << 10) /* Implementation defined */
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#define CR_Z (1 << 11) /* Implementation defined */
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#define CR_I (1 << 12) /* Icache enable */
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#define CR_V (1 << 13) /* Vectors relocated to 0xffff0000 */
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#define CR_RR (1 << 14) /* Round Robin cache replacement */
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#define CR_L4 (1 << 15) /* LDR pc can set T bit */
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#define CR_DT (1 << 16)
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#define CR_IT (1 << 18)
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#define CR_ST (1 << 19)
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#define CR_FI (1 << 21) /* Fast interrupt (lower latency mode) */
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#define CR_U (1 << 22) /* Unaligned access operation */
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#define CR_XP (1 << 23) /* Extended page tables */
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#define CR_VE (1 << 24) /* Vectored interrupts */
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#define CR_EE (1 << 25) /* Exception (Big) Endian */
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#define CR_TRE (1 << 28) /* TEX remap enable */
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#define CR_AFE (1 << 29) /* Access flag enable */
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#define CR_TE (1 << 30) /* Thumb exception enable */
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/*
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* This is used to ensure the compiler did actually allocate the register we
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* asked it for some inline assembly sequences. Apparently we can't trust
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* the compiler from one version to another so a bit of paranoia won't hurt.
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* This string is meant to be concatenated with the inline asm string and
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* will cause compilation to stop on mismatch.
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* (for details, see gcc PR 15089)
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*/
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#define __asmeq(x, y) ".ifnc " x "," y " ; .err ; .endif\n\t"
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#define isb() __asm__ __volatile__ ("" : : : "memory")
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#define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
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#define arch_align_stack(x) (x)
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#ifndef __ASSEMBLER__
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static inline unsigned int get_cr(void)
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{
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unsigned int val;
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asm("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc");
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return val;
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}
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static inline void set_cr(unsigned int val)
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{
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asm volatile("mcr p15, 0, %0, c1, c0, 0 @ set CR"
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: : "r" (val) : "cc");
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isb();
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}
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/* options available for data cache on each page */
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enum dcache_option {
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DCACHE_OFF,
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DCACHE_WRITETHROUGH,
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DCACHE_WRITEBACK,
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};
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/* Size of an MMU section */
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enum {
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MMU_SECTION_SHIFT = 20,
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MMU_SECTION_SIZE = 1 << MMU_SECTION_SHIFT,
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};
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/**
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* Change the cache settings for a region.
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*
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* \param start start address of memory region to change
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* \param size size of memory region to change
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* \param option dcache option to select
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*/
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void mmu_set_region_dcache(unsigned long start, int size,
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enum dcache_option option);
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/**
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* Register an update to the page tables, and flush the TLB
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*
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* \param start start address of update in page table
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* \param stop stop address of update in page table
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*/
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void mmu_page_table_flush(unsigned long start, unsigned long stop);
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void dram_bank_mmu_setup(unsigned long start, unsigned long size);
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void arm_init_before_mmu(void);
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/*
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* FIXME: sdelay, sr32, and wait_on_value originally came from
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* arch/arm/cpu/armv7/exynos5/setup.h in u-boot but do not seem
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* specific to exynos5...
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*/
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void sdelay(unsigned long loops);
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void sr32(void *addr, u32 start_bit, u32 num_bits, u32 value);
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u32 wait_on_value(u32 read_bit_mask, u32 match_value, void *read_addr,
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u32 bound);
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#endif // __ASSEMBLY__
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#endif /* SYSTEM_H_ */
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