gart: factor out common code
From: Pavel Machek
Date: Tue Apr 15 2008 - 06:43:20 EST
Cleanup gart handling on amd64 a bit: move common code into
enable_gart_translation , and use symbolic register names where
appropriate.
Signed-off-by: Pavel Machek <pavel@xxxxxxx>
---
commit 43cfc0427c14f482e36adac447409c82b5cbbe09
tree fc873f1b75d5f1be05978124e7d9a9a31efc2d23
parent 5c9a05115efe1572a05bb1ba155b1e7870374a37
author Pavel <pavel@xxxxxxxxxx> Tue, 15 Apr 2008 12:42:29 +0200
committer Pavel <pavel@xxxxxxxxxx> Tue, 15 Apr 2008 12:42:29 +0200
arch/x86/kernel/pci-gart_64.c | 23 ++++++-----------------
drivers/char/agp/amd64-agp.c | 30 ++++++++++--------------------
include/asm-x86/gart.h | 17 +++++++++++++++++
3 files changed, 33 insertions(+), 37 deletions(-)
diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index fd3c475..035dc61 100644
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -534,8 +534,8 @@ static __init unsigned read_aperture(str
unsigned aper_size = 0, aper_base_32, aper_order;
u64 aper_base;
- pci_read_config_dword(dev, 0x94, &aper_base_32);
- pci_read_config_dword(dev, 0x90, &aper_order);
+ pci_read_config_dword(dev, AMD64_GARTAPERTUREBASE, &aper_base_32);
+ pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &aper_order);
aper_order = (aper_order >> 1) & 7;
aper_base = aper_base_32 & 0x7fff;
@@ -593,19 +593,8 @@ static __init int init_k8_gatt(struct ag
agp_gatt_table = gatt;
for (i = 0; i < num_k8_northbridges; i++) {
- u32 gatt_reg;
- u32 ctl;
-
dev = k8_northbridges[i];
- gatt_reg = __pa(gatt) >> 12;
- gatt_reg <<= 4;
- pci_write_config_dword(dev, AMD64_GARTTABLEBASE, gatt_reg);
- pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl);
-
- ctl |= GARTEN;
- ctl &= ~(DISGARTCPU | DISGARTIO);
-
- pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl);
+ enable_gart_translation(dev, __pa(gatt));
}
flush_gart();
@@ -646,11 +635,11 @@ void gart_iommu_shutdown(void)
u32 ctl;
dev = k8_northbridges[i];
- pci_read_config_dword(dev, 0x90, &ctl);
+ pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl);
- ctl &= ~1;
+ ctl &= ~GARTEN;
- pci_write_config_dword(dev, 0x90, ctl);
+ pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl);
}
}
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index 25d6422..7e64c3c 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -150,25 +150,14 @@ static u64 amd64_configure(struct pci_de
{
u64 aperturebase;
u32 tmp;
- u64 addr, aper_base;
+ u64 aper_base;
/* Address to map to */
- pci_read_config_dword (hammer, AMD64_GARTAPERTUREBASE, &tmp);
+ pci_read_config_dword(hammer, AMD64_GARTAPERTUREBASE, &tmp);
aperturebase = tmp << 25;
aper_base = (aperturebase & PCI_BASE_ADDRESS_MEM_MASK);
- /* address of the mappings table */
- addr = (u64) gatt_table;
- addr >>= 12;
- tmp = (u32) addr<<4;
- tmp &= ~0xf;
- pci_write_config_dword(hammer, AMD64_GARTTABLEBASE, tmp);
-
- /* Enable GART translation for this hammer. */
- pci_read_config_dword(hammer, AMD64_GARTAPERTURECTL, &tmp);
- tmp |= GARTEN;
- tmp &= ~(DISGARTCPU | DISGARTIO);
- pci_write_config_dword(hammer, AMD64_GARTAPERTURECTL, tmp);
+ enable_gart_translation(hammer, gatt_table);
return aper_base;
}
@@ -207,9 +196,9 @@ static void amd64_cleanup(void)
for (i = 0; i < num_k8_northbridges; i++) {
struct pci_dev *dev = k8_northbridges[i];
/* disable gart translation */
- pci_read_config_dword (dev, AMD64_GARTAPERTURECTL, &tmp);
+ pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &tmp);
tmp &= ~AMD64_GARTEN;
- pci_write_config_dword (dev, AMD64_GARTAPERTURECTL, tmp);
+ pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, tmp);
}
}
@@ -289,9 +278,9 @@ static __devinit int fix_northbridge(str
u32 nb_order, nb_base;
u16 apsize;
- pci_read_config_dword(nb, 0x90, &nb_order);
+ pci_read_config_dword(nb, AMD64_GARTAPERTURECTL, &nb_order);
nb_order = (nb_order >> 1) & 7;
- pci_read_config_dword(nb, 0x94, &nb_base);
+ pci_read_config_dword(nb, AMD64_GARTAPERTUREBASE, &nb_base);
nb_aper = nb_base << 25;
if (aperture_valid(nb_aper, (32*1024*1024)<<nb_order)) {
return 0;
@@ -316,8 +306,8 @@ static __devinit int fix_northbridge(str
if (order < 0 || !aperture_valid(aper, (32*1024*1024)<<order))
return -1;
- pci_write_config_dword(nb, 0x90, order << 1);
- pci_write_config_dword(nb, 0x94, aper >> 25);
+ pci_write_config_dword(nb, AMD64_GARTAPERTURECTL, order << 1);
+ pci_write_config_dword(nb, AMD64_GARTAPERTUREBASE, aper >> 25);
return 0;
}
diff --git a/include/asm-x86/gart.h b/include/asm-x86/gart.h
index 248e577..6f22786 100644
--- a/include/asm-x86/gart.h
+++ b/include/asm-x86/gart.h
@@ -52,4 +52,21 @@ #define AMD64_GARTTABLEBASE 0x98
#define AMD64_GARTCACHECTL 0x9c
#define AMD64_GARTEN (1<<0)
+static inline void enable_gart_translation(struct pci_dev *dev, u64 addr)
+{
+ u32 tmp, ctl;
+
+ /* address of the mappings table */
+ addr >>= 12;
+ tmp = (u32) addr<<4;
+ tmp &= ~0xf;
+ pci_write_config_dword(dev, AMD64_GARTTABLEBASE, tmp);
+
+ /* Enable GART translation for this hammer. */
+ pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl);
+ ctl |= GARTEN;
+ ctl &= ~(DISGARTCPU | DISGARTIO);
+ pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl);
+}
+
#endif
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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