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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2293 | Serge | 1 | #include |
| 2 | #include |
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| 3 | #include "acpi.h" |
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| 4 | |||
| 5 | extern acpi_rsdp_t* acpi_rsdp; |
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| 6 | extern acpi_rsdt_t* acpi_rsdt; |
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| 7 | |||
| 8 | addr_t acpi_ioapic; |
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| 9 | addr_t acpi_local_apic; |
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| 10 | |||
| 11 | u8_t __fastcall acpi_table_checksum(u32_t length, u8_t *buffer); |
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| 12 | |||
| 13 | acpi_rsdp_t* acpi_locate() |
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| 14 | { |
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| 15 | /** @todo checksum, check version */ |
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| 16 | addr_t p; |
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| 17 | |||
| 18 | for (p = ACPI_HI_RSDP_WINDOW_START; p < ACPI_HI_RSDP_WINDOW_END; p+=16) |
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| 19 | { |
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| 20 | acpi_rsdp_t* r = (acpi_rsdp_t*) p; |
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| 21 | if ((r->sig[0] == 0x20445352) && |
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| 22 | (r->sig[1] == 0x20525450) && |
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| 23 | acpi_table_checksum(ACPI_RSDP_CHECKSUM_LENGTH, (u8_t*)r)==0 ) |
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| 24 | { |
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| 25 | return r; |
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| 26 | }; |
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| 27 | }; |
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| 28 | /* not found */ |
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| 29 | return NULL; |
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| 30 | }; |
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| 31 | |||
| 32 | addr_t __fastcall rsdt_find(acpi_rsdt_t *rsdt, u32_t sig) |
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| 33 | { |
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| 34 | addr_t head = 0; |
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| 35 | u32_t i; |
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| 36 | |||
| 37 | for (i = 0; i < ((rsdt->header.len-sizeof(acpi_thead_t))/ |
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| 38 | sizeof(rsdt->ptrs[0])); i++) |
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| 39 | { |
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| 40 | acpi_thead_t* t= (acpi_thead_t*)acpi_remap_table(rsdt->ptrs[i]); |
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| 41 | |||
| 42 | if (t->sig == sig) |
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| 43 | { |
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| 44 | head = rsdt->ptrs[i]; |
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| 45 | break; |
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| 46 | }; |
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| 47 | } |
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| 48 | return head; |
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| 49 | }; |
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| 50 |