/* * mmid - get context id from mm pointer (mm->context.id) * note, this field is 64bit, so in big-endian the two words are swapped too.
*/
.macro mmid, rd, rn
#ifdef __ARMEB__
ldr \rd, [\rn, #MM_CONTEXT_ID + 4 ]
#else
ldr \rd, [\rn, #MM_CONTEXT_ID]
#endif
.endm
/* * mask_asid - mask the ASID from the context ID
*/
.macro asid, rd, rn
and \rd, \rn, #255
.endm
/* * dcache_line_size - get the minimum D-cache line size from the CTR register * on ARMv7.
*/
.macro dcache_line_size, reg, tmp
#ifdef CONFIG_CPU_V7M
movw \tmp, #:lower16:BASEADDR_V7M_SCB + V7M_SCB_CTR
movt \tmp, #:upper16:BASEADDR_V7M_SCB + V7M_SCB_CTR
ldr \tmp, [\tmp]
#else
mrc p15, 0, \tmp, c0, c0, 1 @ read ctr
#endif
lsr \tmp, \tmp, #16
and \tmp, \tmp, #0xf @ cache line size encoding
mov \reg, #4 @ bytes per word
mov \reg, \reg, lsl \tmp @ actual cache line size
.endm
/* * icache_line_size - get the minimum I-cache line size from the CTR register * on ARMv7.
*/
.macro icache_line_size, reg, tmp
#ifdef CONFIG_CPU_V7M
movw \tmp, #:lower16:BASEADDR_V7M_SCB + V7M_SCB_CTR
movt \tmp, #:upper16:BASEADDR_V7M_SCB + V7M_SCB_CTR
ldr \tmp, [\tmp]
#else
mrc p15, 0, \tmp, c0, c0, 1 @ read ctr
#endif
and \tmp, \tmp, #0xf @ cache line size encoding
mov \reg, #4 @ bytes per word
mov \reg, \reg, lsl \tmp @ actual cache line size
.endm
/* * Sanity check the PTE configuration for the code below - which makes * certain assumptions about how these bits are laid out.
*/
#ifdef CONFIG_MMU
#if L_PTE_SHARED != PTE_EXT_SHARED
#error PTE shared bit mismatch
#endif
#if !defined (CONFIG_ARM_LPAE) && \
(L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\
L_PTE_PRESENT) > L_PTE_SHARED
#error Invalid Linux PTE bit settings
#endif
#endif /* CONFIG_MMU */
/* * Xscale set_pte_ext translation, split into two halves to cope * with work-arounds. r3 must be preserved by code between these * two macros. * * Permission translation: * YUWD AP SVC User * 0xxx 00 no acc no acc * 100x 00 r/o no acc * 10x0 00 r/o no acc * 1011 01 r/w no acc * 110x 10 r/w r/o * 11x0 10 r/w r/o * 1111 11 r/w r/w
*/
.macro xscale_set_pte_ext_prologue
str r1, [r0] @ linux version
tst r3, #L_PTE_USER @ user?
orrne r2, r2, #PTE_EXT_AP_URO_SRW @ yes -> user r/o, system r/w
tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty?
orreq r2, r2, #PTE_EXT_AP_UNO_SRW @ yes -> user n/a, system r/w
@ combined with user -> user r/w
.endm
.macro xscale_set_pte_ext_epilogue
tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young?
movne r2, #0 @ no -> fault
str r2, [r0, #2048]! @ hardware version
mov ip, #0
mcr p15, 0, r0, c7, c10, 1 @ clean L1 D line
mcr p15, 0, ip, c7, c10, 4 @ data write barrier
.endm
.macro define_processor_functions name:req, dabort:req, pabort:req, nommu=0, suspend=0, bugs=0 /* * If we are building for big.Little with branch predictor hardening, * we need the processor function tables to remain available after boot.
*/
#if defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR)
.section".rodata"
#endif
.type \name\()_processor_functions, #object
.align 2
ENTRY(\name\()_processor_functions)
.word \dabort
.word \pabort
.word cpu_\name\()_proc_init
.word \bugs
.word cpu_\name\()_proc_fin
.word cpu_\name\()_reset
.word cpu_\name\()_do_idle
.word cpu_\name\()_dcache_clean_area
.word cpu_\name\()_switch_mm
.macro initfn, func, base
.long \func - \base
.endm
/* * Macro to calculate the log2 size for the protection region * registers. This calculates rd = log2(size) - 1. tmp must * not be the same register as rd.
*/
.macro pr_sz, rd, size, tmp
mov \tmp, \size, lsr #12
mov \rd, #11
1: movs \tmp, \tmp, lsr #1
addne \rd, \rd, #1
bne 1b
.endm
/* * Macro to generate a protection region register value * given a pre-masked address, size, and enable bit. * Corrupts size.
*/
.macro pr_val, dest, addr, size, enable
pr_sz \dest, \size, \size @ calculate log2(size) - 1
orr \dest, \addr, \dest, lsl #1 @ mask in the region size
orr \dest, \dest, \enable
.endm
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