[PATCH 1/6] AMD Geode GX/LX Support (Refreshed)
From: Jordan Crouse
Date: Fri Oct 28 2005 - 11:32:12 EST
This is the base GX/LX support patch. Prior changelog:
* fixed up the MGEODEGX1 cache line size to the correct value.
* Removed GEODE_LX restrictions from IOAPIC and HIGHMEM (Alan Cox and others)
* Removed GEODE_LX define from the 3DNOW config option pending conclusive
benchmark results that it increases performance (Alan Cox)
* Fix up the GX1/GX cpu init function so that it is cleaner and more
correct. If anybody gets a NSC branded GX1 processor, it should jump
into the init_cyrix and do the right thing. (Alan Cox)
* Updated the MAINTAINERS information (Adrian Bunk)
MAINTAINERS | 7 +++++++
arch/i386/Kconfig | 12 +++++++++---
arch/i386/kernel/cpu/amd.c | 7 +++++++
arch/i386/kernel/cpu/cyrix.c | 32 +++++++++++++++++++++++++++++++-
include/asm-i386/module.h | 4 +++-
include/linux/pci_ids.h | 10 ++++++++++
6 files changed, 67 insertions(+), 5 deletions(-)
Index: linux-2.6.14/arch/i386/Kconfig
===================================================================
--- linux-2.6.14.orig/arch/i386/Kconfig
+++ linux-2.6.14/arch/i386/Kconfig
@@ -191,6 +191,7 @@ config M386
- "Winchip-2" for IDT Winchip 2.
- "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
- "GeodeGX1" for Geode GX1 (Cyrix MediaGX).
+ - "Geode GX/LX" For AMD Geode GX and LX processors.
- "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
- "VIA C3-2 for VIA C3-2 "Nehemiah" (model 9 and above).
@@ -323,6 +324,11 @@ config MGEODEGX1
help
Select this for a Geode GX1 (Cyrix MediaGX) chip.
+config MGEODE_LX
+ bool "Geode GX/LX"
+ help
+ Select this for AMD Geode GX and LX processors.
+
config MCYRIXIII
bool "CyrixIII/VIA-C3"
help
@@ -372,8 +378,8 @@ config X86_XADD
config X86_L1_CACHE_SHIFT
int
default "7" if MPENTIUM4 || X86_GENERIC
- default "4" if X86_ELAN || M486 || M386
- default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODEGX1
+ default "4" if X86_ELAN || M486 || M386 || MGEODEGX1
+ default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
default "6" if MK7 || MK8 || MPENTIUMM
config RWSEM_GENERIC_SPINLOCK
@@ -437,7 +443,7 @@ config X86_INTEL_USERCOPY
config X86_USE_PPRO_CHECKSUM
bool
- depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON
+ depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX
default y
config X86_USE_3DNOW
Index: linux-2.6.14/arch/i386/kernel/cpu/amd.c
===================================================================
--- linux-2.6.14.orig/arch/i386/kernel/cpu/amd.c
+++ linux-2.6.14/arch/i386/kernel/cpu/amd.c
@@ -161,6 +161,13 @@ static void __init init_amd(struct cpuin
set_bit(X86_FEATURE_K6_MTRR, c->x86_capability);
break;
}
+
+ if ( c->x86_model == 10 ) {
+ /* AMD Geode LX is model 10 */
+ /* placeholder for any needed mods */
+ break;
+ }
+
break;
case 6: /* An Athlon/Duron */
Index: linux-2.6.14/include/linux/pci_ids.h
===================================================================
--- linux-2.6.14.orig/include/linux/pci_ids.h
+++ linux-2.6.14/include/linux/pci_ids.h
@@ -405,6 +405,13 @@
#define PCI_DEVICE_ID_NS_SC1100_XBUS 0x0515
#define PCI_DEVICE_ID_NS_87410 0xd001
+#define PCI_DEVICE_ID_NS_CS5535_HOST_BRIDGE 0x0028
+#define PCI_DEVICE_ID_NS_CS5535_ISA_BRIDGE 0x002b
+#define PCI_DEVICE_ID_NS_CS5535_IDE 0x002d
+#define PCI_DEVICE_ID_NS_CS5535_AUDIO 0x002e
+#define PCI_DEVICE_ID_NS_CS5535_USB 0x002f
+#define PCI_DEVICE_ID_NS_CS5535_VIDEO 0x0030
+
#define PCI_VENDOR_ID_TSENG 0x100c
#define PCI_DEVICE_ID_TSENG_W32P_2 0x3202
#define PCI_DEVICE_ID_TSENG_W32P_b 0x3205
@@ -536,6 +543,9 @@
#define PCI_DEVICE_ID_AMD_8151_0 0x7454
#define PCI_DEVICE_ID_AMD_8131_APIC 0x7450
+#define PCI_DEVICE_ID_AMD_LX_VIDEO 0x2081
+#define PCI_DEVICE_ID_AMD_LX_AES 0x2082
+
#define PCI_VENDOR_ID_TRIDENT 0x1023
#define PCI_DEVICE_ID_TRIDENT_4DWAVE_DX 0x2000
#define PCI_DEVICE_ID_TRIDENT_4DWAVE_NX 0x2001
Index: linux-2.6.14/MAINTAINERS
===================================================================
--- linux-2.6.14.orig/MAINTAINERS
+++ linux-2.6.14/MAINTAINERS
@@ -252,6 +252,13 @@ P: Ivan Kokshaysky
M: ink@xxxxxxxxxxxxxxxxxxxx
S: Maintained for 2.4; PCI support for 2.6.
+AMD GEODE PROCESSOR/CHIPSET SUPPORT
+P: Jordan Crouse
+M: info-linux@xxxxxxxxxxxxx
+L: info-linux@xxxxxxxxxxxxx
+W: http://www.amd.com/us-en/ConnectivitySolutions/TechnicalResources/0,,50_2334_2452_11363,00.html
+S: Supported
+
APM DRIVER
P: Stephen Rothwell
M: sfr@xxxxxxxxxxxxxxxx
Index: linux-2.6.14/arch/i386/kernel/cpu/cyrix.c
===================================================================
--- linux-2.6.14.orig/arch/i386/kernel/cpu/cyrix.c
+++ linux-2.6.14/arch/i386/kernel/cpu/cyrix.c
@@ -342,6 +342,36 @@ static void __init init_cyrix(struct cpu
return;
}
+
+/* This function handles National Semiconductor branded processors */
+
+static void __init init_nsc(struct cpuinfo_x86 *c)
+{
+ int r;
+
+ /* There may be GX1 processors in the wild that are branded
+ * NSC and not Cyrix.
+ *
+ * This function only handles the GX processor, and kicks every
+ * thing else to the Cyrix init function above - that should
+ * cover any processors that might have been branded differently
+ * after NSC aquired Cyrix.
+ *
+ * If this breaks your GX1 horribly, please e-mail
+ * info-linux@xxxxxxxxxxxxxxx to tell us.
+ */
+
+ /* Handle the GX (Formally known as the GX2) */
+
+ if ((c->x86 == 5) && (c->x86_model == 5)) {
+ r = get_model_name(c);
+ display_cacheinfo(c);
+ }
+ else
+ init_cyrix(c);
+}
+
+
/*
* Cyrix CPUs without cpuid or with cpuid not yet enabled can be detected
* by the fact that they preserve the flags across the division of 5/2.
@@ -422,7 +452,7 @@ int __init cyrix_init_cpu(void)
static struct cpu_dev nsc_cpu_dev __initdata = {
.c_vendor = "NSC",
.c_ident = { "Geode by NSC" },
- .c_init = init_cyrix,
+ .c_init = init_nsc,
.c_identify = generic_identify,
};
Index: linux-2.6.14/include/asm-i386/module.h
===================================================================
--- linux-2.6.14.orig/include/asm-i386/module.h
+++ linux-2.6.14/include/asm-i386/module.h
@@ -52,8 +52,10 @@ struct mod_arch_specific
#define MODULE_PROC_FAMILY "CYRIXIII "
#elif defined CONFIG_MVIAC3_2
#define MODULE_PROC_FAMILY "VIAC3-2 "
-#elif CONFIG_MGEODEGX1
+#elif defined CONFIG_MGEODEGX1
#define MODULE_PROC_FAMILY "GEODEGX1 "
+#elif defined CONFIG_MGEODE_LX
+#define MODULE_PROC_FAMILY "GEODE "
#else
#error unknown processor family
#endif
-
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