From 2b664dd0a0ba1c8d234642d52bd03fbb2b1f9e50 Mon Sep 17 00:00:00 2001
From: "Ronald G. Minnich" <rminnich@gmail.com>
Date: Thu, 25 Sep 2003 17:01:28 +0000
Subject: first cut at 8601 support

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1131 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
---
 src/northbridge/via/vt8601/northbridge.c | 106 +++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 src/northbridge/via/vt8601/northbridge.c

(limited to 'src/northbridge/via/vt8601/northbridge.c')

diff --git a/src/northbridge/via/vt8601/northbridge.c b/src/northbridge/via/vt8601/northbridge.c
new file mode 100644
index 0000000000..33dc4ec758
--- /dev/null
+++ b/src/northbridge/via/vt8601/northbridge.c
@@ -0,0 +1,106 @@
+#include <console/console.h>
+#include <arch/io.h>
+#include <stdint.h>
+#include <mem.h>
+#include <part/sizeram.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/hypertransport.h>
+#include <device/chip.h>
+#include <stdlib.h>
+#include <string.h>
+#include <bitops.h>
+#include "chip.h"
+#include "northbridge.h"
+
+struct mem_range *sizeram(void)
+{
+	unsigned long mmio_basek;
+	static struct mem_range mem[10];
+	device_t dev;
+	int i, idx;
+
+#warning "FIXME handle interleaved nodes"
+	dev = dev_find_slot(0, PCI_DEVFN(0x18, 1));
+	if (!dev) {
+		printk_err("Cannot find PCI: 0:18.1\n");
+		return 0;
+	}
+	mmio_basek = (dev_root.resource[1].base >> 10);
+	/* Round mmio_basek to something the processor can support */
+	mmio_basek &= ~((1 << 6) -1);
+
+#if 1
+#warning "FIXME improve mtrr.c so we don't use up all of the mtrrs with a 64M MMIO hole"
+	/* Round the mmio hold to 256M */
+	mmio_basek &= ~((256*1024) - 1);
+#endif
+
+#if 1
+	printk_debug("mmio_base: %dKB\n", mmio_basek);
+#endif
+
+	for(idx = i = 0; i < 8; i++) {
+		uint32_t base, limit;
+		unsigned basek, limitk, sizek;
+		base  = pci_read_config32(dev, 0x40 + (i<<3));
+		limit = pci_read_config32(dev, 0x44 + (i<<3));
+		if ((base & ((1<<1)|(1<<0))) != ((1<<1)|(1<<0))) {
+			continue;
+		}
+		basek = (base & 0xffff0000) >> 2;
+		limitk = ((limit + 0x00010000) & 0xffff0000) >> 2;
+		sizek = limitk - basek;
+		if ((idx > 0) &&
+			((mem[idx -1].basek + mem[idx - 1].sizek) == basek)) {
+			mem[idx -1].sizek += sizek;
+		}
+		else {
+			mem[idx].basek = basek;
+			mem[idx].sizek = sizek;
+			idx++;
+		}
+		/* See if I need to split the region to accomodate pci memory space */
+		if ((mem[idx - 1].basek <= mmio_basek) &&
+			((mem[idx - 1].basek + mem[idx - 1].sizek) >  mmio_basek)) {
+			if (mem[idx - 1].basek < mmio_basek) {
+				unsigned pre_sizek;
+				pre_sizek = mmio_basek - mem[idx - 1].basek;
+				mem[idx].basek = mmio_basek;
+				mem[idx].sizek = mem[idx - 1].sizek - pre_sizek;
+				mem[idx - 1].sizek = pre_sizek;
+				idx++;
+			}
+			if ((mem[idx - 1].basek + mem[idx - 1].sizek) <= 4*1024*1024) {
+				idx -= 1;
+			}
+			else {
+				mem[idx - 1].basek = 4*1024*1024;
+				mem[idx - 1].sizek -= (4*1024*1024 - mmio_basek);
+			}
+		}
+	}
+#if 0
+	for(i = 0; i < idx; i++) {
+		printk_debug("mem[%d].basek = %08x mem[%d].sizek = %08x\n",
+			i, mem[i].basek, i, mem[i].sizek);
+	}
+#endif
+	while(idx < sizeof(mem)/sizeof(mem[0])) {
+		mem[idx].basek = 0;
+		mem[idx].sizek = 0;
+		idx++;
+	}
+	return mem;
+}
+static void enumerate(struct chip *chip)
+{
+	extern struct device_operations default_pci_ops_bus;
+	chip_enumerate(chip);
+	chip->dev->ops = &default_pci_ops_bus;
+}
+
+struct chip_control northbridge_via_vt8601_control = {
+	.enumerate = enumerate,
+	.name   = "VIA vt8601 Northbridge",
+};
-- 
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