| Kyösti Mälkki | 88decca | 2023-04-28 07:04:34 +0300 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | #include <acpi/acpi.h> |
| 4 | #include <console/console.h> |
| 5 | #include <stdint.h> |
| 6 | |
| 7 | static void fill_x_pm_io(acpi_addr_t *x_pm_blk, int access_size, uint16_t ioport, uint8_t len) |
| 8 | { |
| 9 | x_pm_blk->space_id = ACPI_ADDRESS_SPACE_IO; |
| 10 | x_pm_blk->bit_width = len * 8; |
| 11 | x_pm_blk->bit_offset = 0; |
| 12 | x_pm_blk->access_size = access_size; |
| 13 | x_pm_blk->addrl = ioport; |
| 14 | x_pm_blk->addrh = 0x0; |
| 15 | } |
| 16 | |
| 17 | static void do_sanity_error(const char *func, const int line) |
| 18 | { |
| 19 | printk(BIOS_ERR, "ACPI: FADT error detected, %s line %d.\n", func, line); |
| 20 | } |
| 21 | |
| 22 | #define fadt_sanity(x) do { if (!(x)) do_sanity_error(__func__, __LINE__); } while (0) |
| 23 | |
| 24 | void fill_fadt_extended_pm_io(acpi_fadt_t *fadt) |
| 25 | { |
| 26 | fadt_sanity(fadt->pm1a_evt_blk && (fadt->pm1_evt_len >= 4)); |
| 27 | |
| 28 | /* Upper word is reserved and Linux complains about 32 bit. */ |
| 29 | fadt_sanity(fadt->pm1a_cnt_blk && (fadt->pm1_cnt_len == 2)); |
| 30 | |
| 31 | fill_x_pm_io(&fadt->x_pm1a_evt_blk, ACPI_ACCESS_SIZE_WORD_ACCESS, |
| 32 | fadt->pm1a_evt_blk, fadt->pm1_evt_len); |
| 33 | |
| 34 | fill_x_pm_io(&fadt->x_pm1a_cnt_blk, ACPI_ACCESS_SIZE_WORD_ACCESS, |
| 35 | fadt->pm1a_cnt_blk, fadt->pm1_cnt_len); |
| 36 | |
| 37 | if (fadt->pm1b_evt_blk) |
| 38 | fill_x_pm_io(&fadt->x_pm1b_evt_blk, ACPI_ACCESS_SIZE_WORD_ACCESS, |
| 39 | fadt->pm1b_evt_blk, fadt->pm1_evt_len); |
| 40 | |
| 41 | if (fadt->pm1b_cnt_blk) |
| 42 | fill_x_pm_io(&fadt->x_pm1b_cnt_blk, ACPI_ACCESS_SIZE_WORD_ACCESS, |
| 43 | fadt->pm1b_cnt_blk, fadt->pm1_cnt_len); |
| 44 | |
| 45 | if (fadt->pm_tmr_blk) { |
| 46 | fadt_sanity(fadt->pm_tmr_len == 4); |
| 47 | fill_x_pm_io(&fadt->x_pm_tmr_blk, ACPI_ACCESS_SIZE_DWORD_ACCESS, |
| 48 | fadt->pm_tmr_blk, fadt->pm_tmr_len); |
| 49 | } |
| 50 | |
| 51 | if (fadt->pm2_cnt_blk) |
| 52 | fill_x_pm_io(&fadt->x_pm2_cnt_blk, ACPI_ACCESS_SIZE_BYTE_ACCESS, |
| 53 | fadt->pm2_cnt_blk, fadt->pm2_cnt_len); |
| 54 | |
| 55 | /* |
| 56 | * Windows 10 requires x_gpe0_blk to be set starting with FADT revision 5. |
| 57 | * The bit_width field intentionally overflows here. |
| 58 | * The OSPM can instead use the values in `fadt->gpe0_blk{,_len}`, which |
| 59 | * seems to work fine on Linux 5.0 and Windows 10. |
| 60 | * |
| 61 | * FIXME: GPE1_BASE is not initialised. |
| 62 | * |
| 63 | */ |
| 64 | |
| 65 | if (fadt->gpe0_blk) |
| 66 | fill_x_pm_io(&fadt->x_gpe0_blk, ACPI_ACCESS_SIZE_BYTE_ACCESS, |
| 67 | fadt->gpe0_blk, fadt->gpe0_blk_len); |
| 68 | |
| 69 | if (fadt->gpe1_blk) |
| 70 | fill_x_pm_io(&fadt->x_gpe1_blk, ACPI_ACCESS_SIZE_BYTE_ACCESS, |
| 71 | fadt->gpe1_blk, fadt->gpe1_blk_len); |
| 72 | } |