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| author | Elia Yehuda <z4ziggy@gmail.com> | 2009-07-05 15:50:30 +0000 |
|---|---|---|
| committer | Uwe Hermann <uwe@hermann-uwe.de> | 2009-07-05 15:50:30 +0000 |
| commit | 76a88d0805a42f3759f1444ab62760f5160fc999 (patch) | |
| tree | 4b49ccbee6f032a5c069e01a2a747aefcd0b3903 /src/northbridge/intel/i82810/northbridge.c | |
| parent | bd4f2f808c258bc58814f3a230d0788a0b0fbd26 (diff) | |
Various Intel 82810/82810E changes which allow onboard VGA to work.
At the same time also make the 82810 code handle 82810E.
- Set SMRAM register according to CONFIG_VIDEO_MB value:
- 512 means 512 KB
- 1 means 1 MB
- Every other value for CONFIG_VIDEO_MB (e.g. 0) disables VGA.
This is not very clean, changing CONFIG_VIDEO_MB to CONFIG_VIDEO_KB
in a future patch may be nicer.
- Set MISSC2 register bits as required per datasheet to make VGA work.
The code handles both 82810 and 82810E.
- northbridge.c: Add __pci_driver entry for the Intel 82810E.
Also:
- Rename PAM register #define to PAMR as per datasheet.
- Drop unused/commented code for now.
- Don't explicitly set GMCHCFG for now, the default works ok. We'll
have to figure out the proper/ideal settings later.
The code is based on a patch from Elia Yehuda <z4ziggy@gmail.com> but
has been modified quite a bit for correctness and minimalism.
Tested on hardware with a slightly modified MS-6178 target,
patches to enable onboard-VGA for MS-6178 will follow.
Signed-off-by: Elia Yehuda <z4ziggy@gmail.com>
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4398 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/northbridge/intel/i82810/northbridge.c')
| -rw-r--r-- | src/northbridge/intel/i82810/northbridge.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/src/northbridge/intel/i82810/northbridge.c b/src/northbridge/intel/i82810/northbridge.c index c705b55a45..22ea99ef7c 100644 --- a/src/northbridge/intel/i82810/northbridge.c +++ b/src/northbridge/intel/i82810/northbridge.c @@ -46,12 +46,20 @@ static struct device_operations northbridge_operations = { .ops_pci = 0, }; -static const struct pci_driver northbridge_driver __pci_driver = { +/* Intel 82810/82810-DC100 */ +static const struct pci_driver i810_northbridge_driver __pci_driver = { .ops = &northbridge_operations, .vendor = PCI_VENDOR_ID_INTEL, .device = 0x7120, }; +/* Intel 82810E */ +static const struct pci_driver i810e_northbridge_driver __pci_driver = { + .ops = &northbridge_operations, + .vendor = PCI_VENDOR_ID_INTEL, + .device = 0x7124, +}; + static void ram_resource(device_t dev, unsigned long index, unsigned long basek, unsigned long sizek) { @@ -139,6 +147,19 @@ static void pci_domain_set_resources(device_t dev) /* Convert tomk from MB to KB. */ tomk = tomk << 10; +#ifdef CONFIG_VIDEO_MB + /* Check for VGA reserved memory. */ + if (CONFIG_VIDEO_MB == 512) { + tomk -= 512; + printk_debug("Allocating %s RAM for VGA\n", "512KB"); + } else if (CONFIG_VIDEO_MB == 1) { + tomk -= 1024 ; + printk_debug("Allocating %s RAM for VGA\n", "1MB"); + } else { + printk_debug("Allocating %s RAM for VGA\n", "0MB"); + } +#endif + /* Compute the top of Low memory. */ tolmk = pci_tolm >> 10; if (tolmk >= tomk) { |