diff options
Diffstat (limited to 'src/soc/intel/baytrail/acpi.c')
| -rw-r--r-- | src/soc/intel/baytrail/acpi.c | 61 |
1 files changed, 60 insertions, 1 deletions
diff --git a/src/soc/intel/baytrail/acpi.c b/src/soc/intel/baytrail/acpi.c index e2e4937b21..ce7f5e45e6 100644 --- a/src/soc/intel/baytrail/acpi.c +++ b/src/soc/intel/baytrail/acpi.c @@ -20,14 +20,51 @@ #include <arch/acpi.h> #include <arch/acpigen.h> +#include <arch/io.h> +#include <arch/smp/mpspec.h> +#include <console/console.h> #include <cpu/x86/smm.h> #include <types.h> #include <string.h> #include <baytrail/acpi.h> #include <baytrail/iomap.h> +#include <baytrail/irq.h> #include <baytrail/pmc.h> +static int acpi_sci_irq(void) +{ + const unsigned long actl = ILB_BASE_ADDRESS + ACTL; + int scis; + static int sci_irq; + + if (sci_irq) + return sci_irq; + + /* Determine how SCI is routed. */ + scis = read32(actl) & SCIS_MASK; + switch (scis) { + case SCIS_IRQ9: + case SCIS_IRQ10: + case SCIS_IRQ11: + sci_irq = scis - SCIS_IRQ9 + 9; + break; + case SCIS_IRQ20: + case SCIS_IRQ21: + case SCIS_IRQ22: + case SCIS_IRQ23: + sci_irq = scis - SCIS_IRQ20 + 20; + break; + default: + printk(BIOS_DEBUG, "Invalid SCI route! Defaulting to IRQ9.\n"); + sci_irq = 9; + break; + } + + printk(BIOS_DEBUG, "SCI is IRQ%d\n", sci_irq); + return sci_irq; +} + void acpi_create_intel_hpet(acpi_hpet_t * hpet) { acpi_header_t *header = &(hpet->header); @@ -70,7 +107,7 @@ void acpi_fill_in_fadt(acpi_fadt_t *fadt) { const uint16_t pmbase = ACPI_BASE_ADDRESS; - fadt->sci_int = 0x9; + fadt->sci_int = acpi_sci_irq(); fadt->smi_cmd = APM_CNT; fadt->acpi_enable = APM_CNT_ACPI_ENABLE; fadt->acpi_disable = APM_CNT_ACPI_DISABLE; @@ -175,3 +212,25 @@ void acpi_fill_in_fadt(acpi_fadt_t *fadt) fadt->x_gpe1_blk.addrh = 0x0; } + +unsigned long acpi_madt_irq_overrides(unsigned long current) +{ + int sci_irq = acpi_sci_irq(); + acpi_madt_irqoverride_t *irqovr; + uint16_t sci_flags = MP_IRQ_TRIGGER_LEVEL; + + /* INT_SRC_OVR */ + irqovr = (void *)current; + current += acpi_create_madt_irqoverride(irqovr, 0, 0, 2, 0); + + if (sci_irq >= 20) + sci_flags |= MP_IRQ_POLARITY_LOW; + else + sci_flags |= MP_IRQ_POLARITY_HIGH; + + irqovr = (void *)current; + current += acpi_create_madt_irqoverride(irqovr, 0, sci_irq, sci_irq, + sci_flags); + + return current; +} |