kernel\4.9\arch\arm64\include\asm\Memory.h #ifndef __phys_to_virt#define__phys_to_virt(x) ((unsigned long)((x) - PHYS_OFFSET) | PAGE_OFFSET)#endif#define__va(x) ((void *)__phys_to_virt((phys_addr_t)(x))) virt_to_page kernel\4.9\arch\arm64\include\asm\Memory.h#define__...
在ARM64架构中,定义了__virt_to_phys()宏,用于将虚拟地址转换为物理地址。通常情况下,物理地址(phys)可以通过以下公式计算:phys = virt - PAGE_OFFSET + PHYS_OFFSET。其中,virt表示虚拟地址,PAGE_OFFSET和PHYS_OFFSET是预定义的常量。 在可信环境和非可信环境之间进行通信和数据传输时,OPTee提供了一系列的API函...
PHYS_OFFSET是DRAM的真实物理地址 memstart_addr = round_down(memblock_start_of_DRAM(), ARM64_MEMSTART_ALIGN); 1 2 当virt_to_phys调用时候,先判断bit47(最高有效位),如果为0,则表示是kernel image的地址, 那么直接使用X[46:0]和kimage_voffset相减即可 kimage_voffset来自汇编中的__mmap_switched函...
ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y) TEXT_OFFSET := $(shellawk"BEGIN {srand(); printf \"0x%06x\n\", \int(2*1024*1024/ (2^ $(CONFIG_ARM64_PAGE_SHIFT)) *\ rand())* (2^ $(CONFIG_ARM64_PAGE_SHIFT))}")elseTEXT_OFFSET :=0x00080000endif...
物理地址的关系: 在arch/arm/include/asm/memory.h中: C-sharp代码 #define__virt_to_phys(x) ((x) -PAGE_OFFSET...PHYS_OFFSET则定于为系统DRAM内存的基地址。因此,对于我们的开发板,并不是将0地址映射到3G,而是将外接的SDRAM的首地址映射到3G。注意:这里的virt_to_phys和 ...
(__x & ~PAGE_OFFSET) + PHYS_OFFSET : \ (__x - kimage_voffset); }) PHYS_OFFSET 是 DRAM 的真实物理地址 memstart_addr = round_down(memblock_start_of_DRAM(), ARM64_MEMSTART_ALIGN); 当virt_to_phys 调用时候,先判断 bit47(最高有效位),如果为 0,则表示是 kernel image 的地址, 那么...
vm_map_size_t map_size; vm_object_t object; vm_object_size_t size; kern_return_t result; boolean_t mask_cur_protection, mask_max_protection; boolean_t kernel_prefault, try_prefault = (page_list_count != 0); vm_map_offset_t offset_in_mapping = 0; #if __arm64__ boolean_t ...
We have stopped using phys MRs in the kernel a while ago, so let's remove all the cruft used to implement them. Signed-off-by: Christoph Hellwig <h...@lst.de> Reviewed-by: Sagi Grimberg <sa...@mellanox.com> Reviewed-by: Jason Gunthorpe <jguntho...@obsidianresearch.com> [core] Re...
*/ void __iomem *baseptr = ioremap(0xFC000000, 1024*1024); /* write a 'A' to the offset 10 of the area */ writeb('A',baseptr+10); /* unmap when we unload the driver */ iounmap(baseptr); - copying and clearing: /* get the 6-byte Ethernet address at ISA address E000:...
armcoremodule.h asm-offsets.h ata.h atf_common.h atmel_hlcdc.h atmel_lcd.h atmel_lcdc.h atmel_mci.h atsha204a-i2c.h audio_codec.h autoboot.h avb_verify.h axi.h axp152.h axp209.h axp221.h axp305.h axp809.h axp818.h axp_pmic.h backlight.h bcb.h bcd.h binman.h...