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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-12-29 11:32:27 +0200 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2015-04-28 07:59:13 +0200 |
| commit | b85a87b7d6f9f12d5c71c32741c8af731ed6be7e (patch) | |
| tree | 67553a9c683557ead346dc1c7b155d3eac475090 /src/southbridge/intel/i82801gx/smihandler.c | |
| parent | 189f3ba974df8f1b305cfa421a151fe069fc1a6f (diff) | |
| download | coreboot-b85a87b7d6f9f12d5c71c32741c8af731ed6be7e.tar.gz coreboot-b85a87b7d6f9f12d5c71c32741c8af731ed6be7e.tar.bz2 coreboot-b85a87b7d6f9f12d5c71c32741c8af731ed6be7e.zip | |
intel SMI handlers: Refactor GPI SMI/SCI routing
Move the GPI interrupt routing selection between SMI/SCI from
mainboards to southbridge. There is speculation if this is all
just legacy APM stuff that could be removed with a followup.
Change-Id: Iab14cf347584513793f417febc47f0559e17f5a5
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Signed-off-by: Nicolas Reinecke <nr@das-labor.org>
Reviewed-on: http://review.coreboot.org/7967
Tested-by: build bot (Jenkins)
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
Diffstat (limited to 'src/southbridge/intel/i82801gx/smihandler.c')
| -rw-r--r-- | src/southbridge/intel/i82801gx/smihandler.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801gx/smihandler.c b/src/southbridge/intel/i82801gx/smihandler.c index e83c722f0bc4..6db08319d656 100644 --- a/src/southbridge/intel/i82801gx/smihandler.c +++ b/src/southbridge/intel/i82801gx/smihandler.c @@ -50,6 +50,42 @@ u8 smm_initialized = 0; */ global_nvs_t *gnvs = (global_nvs_t *)0x0; +static void alt_gpi_mask(u16 clr, u16 set) +{ + u16 alt_gp = inw(pmbase + ALT_GP_SMI_EN); + alt_gp &= ~clr; + alt_gp |= set; + outw(alt_gp, pmbase + ALT_GP_SMI_EN); +} + +static void gpe0_mask(u32 clr, u32 set) +{ + u32 gpe0 = inl(pmbase + GPE0_EN); + gpe0 &= ~clr; + gpe0 |= set; + outl(gpe0, pmbase + GPE0_EN); +} + +void gpi_route_interrupt(u8 gpi, u8 mode) +{ + u32 gpi_rout; + if (gpi >= 16) + return; + + alt_gpi_mask(1 << gpi, 0); + gpe0_mask(1 << (gpi+16), 0); + + gpi_rout = pci_read_config32(PCI_DEV(0, 0x1f, 0), GPIO_ROUT); + gpi_rout &= ~(3 << (2 * gpi)); + gpi_rout |= ((mode & 3) << (2 * gpi)); + pci_write_config32(PCI_DEV(0, 0x1f, 0), GPIO_ROUT, gpi_rout); + + if (mode == GPI_IS_SCI) + gpe0_mask(0, 1 << (gpi+16)); + else if (mode == GPI_IS_SMI) + alt_gpi_mask(0, 1 << gpi); +} + /** * @brief read and clear PM1_STS * @return PM1_STS register |