3d9d6198c8
How To Run:
see TencentOS-tiny\board\ALPHA_I.MX_emmc_256ddr\README.md
TODO Next:
1. VFP support
2. fault diagnosis support
3. qemu vexpress ca9 support
4. raspberry pi support
5. SMP support
36 lines
944 B
C
36 lines
944 B
C
#ifndef __ASM_ARM_DIV64
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#define __ASM_ARM_DIV64
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//#include <asm/system.h>
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/*
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* The semantics of do_div() are:
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*
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* uint32_t do_div(uint64_t *n, uint32_t base)
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* {
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* uint32_t remainder = *n % base;
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* *n = *n / base;
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* return remainder;
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* }
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*
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* In other words, a 64-bit dividend with a 32-bit divisor producing
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* a 64-bit result and a 32-bit remainder. To accomplish this optimally
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* we call a special __do_div64 helper with completely non standard
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* calling convention for arguments and results (beware).
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*/
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extern unsigned int __div64_32(unsigned long long *dividend, unsigned int divisor);
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# define do_div(n,base) ({ \
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unsigned int __base = (base); \
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unsigned int __rem; \
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(void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
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if (((n) >> 32) == 0) { \
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__rem = (unsigned int)(n) % __base; \
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(n) = (unsigned int)(n) / __base; \
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} else \
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__rem = __div64_32(&(n), __base); \
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__rem; \
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})
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#endif
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