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-rw-r--r--src/southbridge/intel/lynxpoint/lpc.c167
-rw-r--r--src/southbridge/intel/lynxpoint/pch.h1
2 files changed, 113 insertions, 55 deletions
diff --git a/src/southbridge/intel/lynxpoint/lpc.c b/src/southbridge/intel/lynxpoint/lpc.c
index a44d80f802..facea7cdd6 100644
--- a/src/southbridge/intel/lynxpoint/lpc.c
+++ b/src/southbridge/intel/lynxpoint/lpc.c
@@ -574,74 +574,131 @@ static void lpc_init(struct device *dev)
pch_fixups(dev);
}
-static void pch_lpc_read_resources(device_t dev)
+static void pch_lpc_add_mmio_resources(device_t dev)
{
+ u32 reg;
struct resource *res;
- config_t *config = dev->chip_info;
- u8 io_index = 0;
-
- /* Get the normal PCI resources of this device. */
- pci_dev_read_resources(dev);
-
- /* Add an extra subtractive resource for both memory and I/O. */
- res = new_resource(dev, IOINDEX_SUBTRACTIVE(io_index++, 0));
- res->base = 0;
- res->size = 0x1000;
- res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE |
- IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+ const u32 default_decode_base = IO_APIC_ADDR;
- /* GPIOBASE */
- res = new_resource(dev, IOINDEX_SUBTRACTIVE(io_index++, 0));
- res->base = DEFAULT_GPIOBASE;
- res->size = DEFAULT_GPIOSIZE;
- res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE |
- IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
-
- res = new_resource(dev, IOINDEX_SUBTRACTIVE(io_index++, 0));
- res->base = 0xff800000;
- res->size = 0x00800000; /* 8 MB for flash */
- res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE |
- IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
-
- res = new_resource(dev, io_index++); /* IOAPIC */
- res->base = IO_APIC_ADDR;
- res->size = 0x00001000;
+ /*
+ * Just report all resources from IO-APIC base to 4GiB. Don't mark
+ * them reserved as that may upset the OS if this range is marked
+ * as reserved in the e820.
+ */
+ res = new_resource(dev, OIC);
+ res->base = default_decode_base;
+ res->size = 0 - default_decode_base;
res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
- /* Set PCH IO decode ranges if required.*/
- if ((config->gen1_dec & 0xFFFC) > 0x1000) {
- res = new_resource(dev, IOINDEX_SUBTRACTIVE(io_index++, 0));
- res->base = config->gen1_dec & 0xFFFC;
- res->size = (config->gen1_dec >> 16) & 0xFC;
- res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE |
- IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+ /* RCBA */
+ if (DEFAULT_RCBA < default_decode_base) {
+ res = new_resource(dev, RCBA);
+ res->base = DEFAULT_RCBA;
+ res->size = 16 * 1024;
+ res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED |
+ IORESOURCE_FIXED | IORESOURCE_RESERVE;
}
- if ((config->gen2_dec & 0xFFFC) > 0x1000) {
- res = new_resource(dev, IOINDEX_SUBTRACTIVE(io_index++, 0));
- res->base = config->gen2_dec & 0xFFFC;
- res->size = (config->gen2_dec >> 16) & 0xFC;
- res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE |
- IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+ /* Check LPC Memory Decode register. */
+ reg = pci_read_config32(dev, LGMR);
+ if (reg & 1) {
+ reg &= ~0xffff;
+ if (reg < default_decode_base) {
+ res = new_resource(dev, LGMR);
+ res->base = reg;
+ res->size = 16 * 1024;
+ res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED |
+ IORESOURCE_FIXED | IORESOURCE_RESERVE;
+ }
}
+}
- if ((config->gen3_dec & 0xFFFC) > 0x1000) {
- res = new_resource(dev, IOINDEX_SUBTRACTIVE(io_index++, 0));
- res->base = config->gen3_dec & 0xFFFC;
- res->size = (config->gen3_dec >> 16) & 0xFC;
- res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE |
- IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
- }
+/* Default IO range claimed by the LPC device. The upper bound is exclusive. */
+#define LPC_DEFAULT_IO_RANGE_LOWER 0
+#define LPC_DEFAULT_IO_RANGE_UPPER 0x1000
+
+static inline int pch_io_range_in_default(u16 base, u16 size)
+{
+ /* Does it start above the range? */
+ if (base >= LPC_DEFAULT_IO_RANGE_UPPER)
+ return 0;
+
+ /* Is it entirely contained? */
+ if (base >= LPC_DEFAULT_IO_RANGE_LOWER &&
+ (base + size) < LPC_DEFAULT_IO_RANGE_UPPER)
+ return 1;
+
+ /* This will return not in range for partial overlaps. */
+ return 0;
+}
+
+/*
+ * Note: this function assumes there is no overlap with the default LPC device's
+ * claimed range: LPC_DEFAULT_IO_RANGE_LOWER -> LPC_DEFAULT_IO_RANGE_UPPER.
+ */
+static void pch_lpc_add_io_resource(device_t dev, u16 base, u16 size, int index)
+{
+ struct resource *res;
+
+ if (pch_io_range_in_default(base, size))
+ return;
- if ((config->gen4_dec & 0xFFFC) > 0x1000) {
- res = new_resource(dev, IOINDEX_SUBTRACTIVE(io_index++, 0));
- res->base = config->gen4_dec & 0xFFFC;
- res->size = (config->gen4_dec >> 16) & 0xFC;
- res->flags = IORESOURCE_IO| IORESOURCE_SUBTRACTIVE |
- IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+ res = new_resource(dev, index);
+ res->base = base;
+ res->size = size;
+ res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+}
+
+static void pch_lpc_add_gen_io_resources(device_t dev, int reg_value, int index)
+{
+ /*
+ * Check if the register is enabled. If so and the base exceeds the
+ * device's deafult claim range add the resoure.
+ */
+ if (reg_value & 1) {
+ u16 base = reg_value & 0xfffc;
+ u16 size = (0x3 | ((reg_value >> 16) & 0xfc)) + 1;
+ pch_lpc_add_io_resource(dev, base, size, index);
}
}
+static void pch_lpc_add_io_resources(device_t dev)
+{
+ struct resource *res;
+ config_t *config = dev->chip_info;
+
+ /* Add the default claimed IO range for the LPC device. */
+ res = new_resource(dev, 0);
+ res->base = LPC_DEFAULT_IO_RANGE_LOWER;
+ res->size = LPC_DEFAULT_IO_RANGE_UPPER - LPC_DEFAULT_IO_RANGE_LOWER;
+ res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+
+ /* GPIOBASE */
+ pch_lpc_add_io_resource(dev, DEFAULT_GPIOBASE, DEFAULT_GPIOSIZE,
+ GPIO_BASE);
+
+ /* PMBASE */
+ pch_lpc_add_io_resource(dev, DEFAULT_PMBASE, 128, PMBASE);
+
+ /* LPC Generic IO Decode range. */
+ pch_lpc_add_gen_io_resources(dev, config->gen1_dec, LPC_GEN1_DEC);
+ pch_lpc_add_gen_io_resources(dev, config->gen2_dec, LPC_GEN2_DEC);
+ pch_lpc_add_gen_io_resources(dev, config->gen3_dec, LPC_GEN3_DEC);
+ pch_lpc_add_gen_io_resources(dev, config->gen4_dec, LPC_GEN4_DEC);
+}
+
+static void pch_lpc_read_resources(device_t dev)
+{
+ /* Get the normal PCI resources of this device. */
+ pci_dev_read_resources(dev);
+
+ /* Add non-standard MMIO resources. */
+ pch_lpc_add_mmio_resources(dev);
+
+ /* Add IO resources. */
+ pch_lpc_add_io_resources(dev);
+}
+
static void pch_lpc_enable_resources(device_t dev)
{
pch_decode_init(dev);
diff --git a/src/southbridge/intel/lynxpoint/pch.h b/src/southbridge/intel/lynxpoint/pch.h
index 5a3725ef29..6739843141 100644
--- a/src/southbridge/intel/lynxpoint/pch.h
+++ b/src/southbridge/intel/lynxpoint/pch.h
@@ -185,6 +185,7 @@ unsigned get_gpios(const int *gpio_num_array);
#define LPC_GEN2_DEC 0x88 /* LPC IF Generic Decode Range 2 */
#define LPC_GEN3_DEC 0x8c /* LPC IF Generic Decode Range 3 */
#define LPC_GEN4_DEC 0x90 /* LPC IF Generic Decode Range 4 */
+#define LGMR 0x98 /* LPC Generic Memory Range */
/* PCI Configuration Space (D31:F1): IDE */
#define PCH_IDE_DEV PCI_DEV(0, 0x1f, 1)
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-22 23:02:48 +0000