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#include <apos/init.h>
#include <apos/sizes.h>
#include <apos/types.h>
#include <libfdt.h>
#include <pages.h>
#include <csr.h>
#include <vmap.h>
struct mem_layout {
pm_t base;
pm_t top;
};
struct mem_layout get_memlayout(void *fdt)
{
fdt32_t *size_ptr = (fdt32_t *)fdt_getprop(fdt, 0, "#size-cells", NULL);
fdt32_t *addr_ptr = (fdt32_t *)fdt_getprop(fdt, 0, "#address-cells", NULL);
uint32_t size_cells = fdt32_to_cpu(*size_ptr);
uint32_t addr_cells = fdt32_to_cpu(*addr_ptr);
int mem_offset = fdt_path_offset(fdt, "/memory");
uint8_t *mem_reg = (uint8_t *)fdt_getprop(fdt, mem_offset, "reg", NULL);
pm_t base;
/* if riscv128 comes around we will probably see addr_cells == 4, but
* I'm not too concerned about it at the moment */
if (addr_cells == 2) {
base = fdt64_to_cpu(*(fdt64_t *)mem_reg);
mem_reg += sizeof(fdt64_t);
} else {
base = fdt32_to_cpu(*(fdt32_t *)mem_reg);
mem_reg += sizeof(fdt32_t);
}
pm_t top;
if (size_cells == 2)
top = fdt64_to_cpu(*(fdt64_t *)mem_reg) + base;
else
top = fdt32_to_cpu(*(fdt64_t *)mem_reg) + base;
struct mem_layout ret = {base, top};
return ret;
}
void init(void *fdt)
{
struct mem_layout pmem = get_memlayout(fdt);
/* struct mm_ptinfo ptbl = create_pagetable(pmem); */
}
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