* Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
*
* This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License v2 as published by
- * the Free Software Foundation.
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
#include <console/console.h>
#include <cpu/x86/msr.h>
#include <cpu/amd/mtrr.h>
+#include <pc80/mc146818rtc.h>
#include <bitops.h>
#include "k8t890.h"
/* The Address Next to the Last Valid DRAM Address */
pci_write_config16(dev, 0x88, (msr.lo >> 24) | reg);
+
}
-static struct resource *resmax;
+#if CONFIG_GFXUMA
+extern uint64_t uma_memory_base, uma_memory_size;
+#endif
-static void get_memres(void *gp, struct device *dev, struct resource *res)
+static void dram_enable_k8m890(struct device *dev)
{
- unsigned int *fbsize = (unsigned int *) gp;
- uint64_t proposed_base = res->base + res->size - *fbsize;
-
- printk_debug("get_memres: res->base=%llx res->size=%llx %d %d %d\n",
- res->base, res->size, (res->size > *fbsize),
- (!(proposed_base & (*fbsize - 1))),
- (proposed_base < ((uint64_t) 0xffffffff)));
-
- /* if we fit and also align OK, and must be below 4GB */
- if ((res->size > *fbsize) && (!(proposed_base & (*fbsize - 1))) &&
- (proposed_base < ((uint64_t) 0xffffffff) )) {
- resmax = res;
+#if CONFIG_GFXUMA
+ msr_t msr;
+ int ret;
+ unsigned int fbbits;
+
+ /* use CMOS */
+ if (CONFIG_VIDEO_MB == -1) {
+ ret = get_option(&fbbits, "videoram_size");
+ if (ret) {
+ printk(BIOS_WARNING, "Failed to get videoram size (error %d), using default.\n", ret);
+ fbbits = 5;
+ }
+
+ if ((fbbits < 1) || (fbbits > 7)) {
+ printk(BIOS_WARNING, "Invalid videoram size (%d), using default.\n",
+ 4 << fbbits);
+ fbbits = 5;
+ }
+ uma_memory_size = 4 << (fbbits + 20);
+ } else {
+ uma_memory_size = (CONFIG_VIDEO_MB << 20);
}
+
+ msr = rdmsr(TOP_MEM);
+ uma_memory_base = msr.lo - uma_memory_size;
+ printk(BIOS_INFO, "K8M890: UMA base is %llx size is %d (MB)\n", uma_memory_base, uma_memory_size / 1024 / 1024);
+ /* enable VGA, so the bridges gets VGA_EN and resources are set */
+ pci_write_config8(dev, 0xa1, 0x80);
+#endif
+ dram_enable(dev);
}
+int
+k8m890_host_fb_size_get(void)
+{
+ struct device *dev = dev_find_device(PCI_VENDOR_ID_VIA,
+ PCI_DEVICE_ID_VIA_K8M890CE_3, 0);
+ unsigned char tmp;
+
+ tmp = pci_read_config8(dev, 0xA1);
+ tmp >>= 4;
+ if (tmp & 0x08)
+ return 4 << (tmp & 7);
+ else
+ return 0;
+}
static void dram_init_fb(struct device *dev)
{
+#if CONFIG_GFXUMA
/* Important bits:
* Enable the internal GFX bit 7 of reg 0xa1 plus in same reg:
- * bits 6:4 X fbuffer size will be 2^(X+2) or 100 = 64MB, 101 = 128MB
+ * bits 6:4 X fbuffer size will be 2^(X+2) or 100 = 64MB, 101 = 128MB
* bits 3:0 BASE [31:28]
* reg 0xa0 bits 7:1 BASE [27:21] bit0 enable CPU access
*/
+ unsigned int fbbits = 0;
u8 tmp;
- uint64_t proposed_base;
- unsigned int fbsize = (K8M890_FBSIZEMB * 1024 * 1024);
-
- resmax = NULL;
- search_global_resources(
- IORESOURCE_MEM | IORESOURCE_CACHEABLE, IORESOURCE_MEM | IORESOURCE_CACHEABLE,
- get_memres, (void *) &fbsize);
-
- /* no space for FB */
- if (!resmax) {
- printk_err("VIA FB: no space for framebuffer in RAM\n");
- return;
- }
+ int ret;
- proposed_base = resmax->base + resmax->size - fbsize;
- resmax->size -= fbsize;
+ fbbits = ((log2(uma_memory_size >> 20) - 2) << 4);
+ printk(BIOS_INFO, "K8M890: Using a %dMB framebuffer.\n", (unsigned int) (uma_memory_size >> 20));
- printk_debug("VIA FB proposed base: %llx\n", proposed_base);
-
- /* enable UMA but no FB */
+ /* Step 1: enable UMA but no FB */
pci_write_config8(dev, 0xa1, 0x80);
- /* 27:21 goes to 7:1, 0 is enable CPU access */
- tmp = (proposed_base >> 20) | 0x1;
- pci_write_config8(dev, 0xa0, tmp);
-
- /* 31:28 goes to 3:0 */
- tmp = ((proposed_base >> 28) & 0xf);
- tmp = ((log2(K8M890_FBSIZEMB) - 2) << 4);
- tmp |= 0x80;
+ /* Step 2: enough is just the FB size, the CPU accessible address is not needed */
+ tmp = fbbits | 0x80;
pci_write_config8(dev, 0xa1, tmp);
/* TODO K8 needs some UMA fine tuning too maybe call some generic routine here? */
+#endif
}
static const struct device_operations dram_ops_t = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
- .enable = dram_enable,
+ .enable = dram_enable_k8m890,
.init = dram_init_fb,
.ops_pci = 0,
};
projects / coreboot.git / blobdiff