forked from Lephenixnoir/gint
43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
//---
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// gint:core:mmu - MMU-related definitions
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//---
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#include <core/mmu.h>
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/* utlb_addr() - get the P4 address of a UTLB address entry */
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INLINE const utlb_addr_t *utlb_addr(uint E)
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{
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uint32_t addr = 0xf6000000 | ((E & 0x3f) << 8);
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return (void *)addr;
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}
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/* utlb_data() - get the P4 address of a UTLB data entry */
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INLINE const utlb_data_t *utlb_data(uint E)
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{
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uint32_t addr = 0xf7000000 | ((E & 0x3f) << 8);
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return (void *)addr;
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}
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/* utlb_mapped_memory() - count amount of mapped memory */
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void utlb_mapped_memory(uint32_t *p_rom, uint32_t *p_ram)
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{
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uint32_t rom = 0, ram = 0;
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for(int E = 0; E < 64; E++)
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{
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const utlb_addr_t *addr = utlb_addr(E);
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const utlb_data_t *data = utlb_data(E);
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if(!addr->V || !data->V) continue;
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int sz = ((data->SZ1 << 1) | data->SZ2) << 3;
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int size = 1 << ((0x14100c0a >> sz) & 0xff);
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uint32_t src = addr->VPN << 10;
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if(src >= 0x00300000 && src < 0x00380000) rom += size;
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if(src >= 0x08100000 && src < 0x08180000) ram += size;
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}
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if(p_rom) *p_rom = rom;
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if(p_ram) *p_ram = ram;
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}
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