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#include <apos/types.h>
#include <apos/mem.h>
#include <apos/vmem.h>
#include <libfdt.h>
size_t __mm_shifts[10];
size_t __mm_widths[10];
size_t __mm_sizes[10];
size_t __mm_page_shift;
size_t __mm_max_order;
void init_mem(size_t max_order, size_t bits[10], size_t page_shift)
{
__mm_max_order = max_order;
__mm_page_shift = page_shift;
__mm_shifts[0] = 0;
__mm_widths[0] = 1 << bits[0];
__mm_sizes[0] = 1 << __mm_page_shift;
for(size_t i = 1; i <= __mm_max_order; ++i){
__mm_widths[i] = 1 << bits[i];
__mm_shifts[i] = __mm_shifts[i - 1] + bits[i - 1];
__mm_sizes[i] = 1UL << __mm_shifts[i] << __mm_page_shift;
}
}
enum mm_mode_t get_mmode(void *fdt)
{
int mmu_offset = fdt_path_offset(fdt, "/cpus/cpu");
const char *mmu = fdt_getprop(fdt, mmu_offset, "mmu-type", NULL);
if(strncmp("riscv,sv48", mmu, 10) == 0)
return Sv48;
if(strncmp("riscv,sv39", mmu, 10) == 0)
return Sv39;
if(strncmp("riscv,sv32", mmu, 10) == 0)
return Sv32;
/* fdt is missing mmu-type for some reason, but we can probably use
* these values as fallback */
if(__riscv_xlen == 32)
return Sv32;
else
return Sv39;
}
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