51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
#include <sys/types.h>
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#include <sys/mman.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <math.h>
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static inline uint32_t rreg(void * rmmio, uint32_t offset)
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{
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uint32_t value = *((volatile uint32_t *)(((uintptr_t)rmmio) + offset));
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asm volatile ("" ::: "memory");
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}
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static inline uint32_t wreg(void * rmmio, uint32_t offset, uint32_t value)
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{
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*((volatile uint32_t *)(((uintptr_t)rmmio) + offset)) = value;
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asm volatile ("" ::: "memory");
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}
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int main()
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{
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////////////////////////////////////////////////////////////////////////
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// PCI resource0
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////////////////////////////////////////////////////////////////////////
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const char * resource2_path = "/sys/bus/pci/devices/0000:01:00.0/resource2";
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int resource2_fd = open(resource2_path, O_RDWR | O_SYNC);
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assert(resource2_fd >= 0);
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uint32_t resource2_size = 0x10000;
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void * resource2_base = mmap(0, resource2_size, PROT_READ | PROT_WRITE, MAP_SHARED, resource2_fd, 0);
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assert(resource2_base != MAP_FAILED);
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void * rmmio = resource2_base;
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uint32_t value1 = rreg(rmmio, 0x6110);
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printf("[r500] D1GRPH_PRIMARY_SURFACE_ADDRESS %08x\n", value1);
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uint32_t value2 = rreg(rmmio, 0x6110 + 0x800);
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printf("[r500] D2GRPH_PRIMARY_SURFACE_ADDRESS %08x\n", value2);
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uint32_t value3 = rreg(rmmio, 0x6118);
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printf("[r500] D1GRPH_SECONDARY_SURFACE_ADDRESS %08x\n", value3);
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uint32_t value4 = rreg(rmmio, 0x6118 + 0x800);
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printf("[r500] D2GRPH_SECONDARY_SURFACE_ADDRESS %08x\n", value4);
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wreg(rmmio, 0x6110, 0x813000);
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wreg(rmmio, 0x6118, 0x813000);
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}
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