New patch to review for coreboot: d303110 i82801gx: Reserve LPC decodes.

[Vladimir Serbinenko]

Vladimir Serbinenko ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/7662

-gerrit

commit d303110dc2f14b0a3fc198c672135f427cfe8899
Author: Vladimir Serbinenko 
Date:   Mon Nov 24 21:05:56 2014 +0100

i82801gx: Reserve LPC decodes.

Makes sure that LPC controller declares resources that it actually decodes.
    bd82x6x already does it but i82801gx doesn't leading to allocator potentially
    allocating something else to the same range.

Change-Id: Ieca9852e54c08e31d4d41aea97f317d9a6919806
    Signed-off-by: Vladimir Serbinenko 
---
 src/southbridge/intel/i82801gx/lpc.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/southbridge/intel/i82801gx/lpc.c b/src/southbridge/intel/i82801gx/lpc.c
index de02686..b40dc4b 100644
--- a/src/southbridge/intel/i82801gx/lpc.c
+++ b/src/southbridge/intel/i82801gx/lpc.c
@@ -603,18 +603,20 @@ void acpi_fill_fadt(acpi_fadt_t * fadt)
 static void i82801gx_lpc_read_resources(device_t dev)
 {
    struct resource *res;
+	u8 io_index = 0;
+	int i;

/* 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(0, 0));
+	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;

-	res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0));
+	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 |
@@ -624,6 +626,20 @@ static void i82801gx_lpc_read_resources(device_t dev)
    res->base = IO_APIC_ADDR;
    res->size = 0x00001000;
    res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+
+	/* Set IO decode ranges if required.*/
+	for (i = 0; i < 4; i++) {
+		u32 gen_dec;
+		gen_dec = pci_read_config32(dev, 0x84 + 4 * i);
+
+		if ((gen_dec & 0xFFFC) > 0x1000) {
+			res = new_resource(dev, IOINDEX_SUBTRACTIVE(io_index++, 0));
+			res->base = gen_dec & 0xFFFC;
+			res->size = (gen_dec >> 16) & 0xFC;
+			res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE |
+				IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+		}
+	}
 }

static void set_subsystem(device_t dev, unsigned vendor, unsigned device)