[coreboot] PIC instead of APIC mode for KolibriOS - mouse fix
Scott Duplichan
scott at notabs.org
Thu May 8 07:18:16 CEST 2014
ron minnich [mailto:rminnich at gmail.com] wrote:
]Thanks, that's a great explanation. Generally, we've tried to avoid
]too much hardware setup in coreboot; that's the job of the kernel.
The PIC mode interrupt routing configuration must be done by
BIOS because proprietary southbridge registers are used. The
register definitions are not even consistent across different
AMD southbridge models. An OEM BIOS does this configuration.
]I'm not really happy that we're doing all this PIC setup for one OS,
]written in assembly.
This is needed for all operating systems that support PIC mode.
For example, Ubuntu 13.10 with boot option acpi=off fails. With
the attached revised patch, it works.
]It's been quite some time since I've had to use PIC mode at all.
]
]Why can't the Kolibrios just use modern standards? And why all this
]effort for an OS written in assembly anyway?
]
]Unix v6 kernels were the same size as Kolibrios. They were written in
]C. That was 40 years ago. It's bizarre, to say the least, to be
]booting a kernel written in assembly from firmware written in C.
]
]Hence, I find it hard to believe that we want this patch. But I'm
]wrong a lot, so if I am here too, just let me know.
It is OK with me to take no action on the patch. The reason is
that the patch is here in the mailing list archives, and anyone
who really wants PIC mode will find it. The patch probably needs
sanitization and additional testing anyway.
]ron
Patch revisions:
1) With the current code, CONFIG_GENERATE_ACPI_TABLES=1 causes
the PCI interrupts to be omitted from the mptable. With the
revised patch, the mptable always includes PCI interrupts. This
solves the Ubuntu acpi=off problem of "can't find IRQ for PCI
INT A; probably buggy MP table".
2) Add PIC mode PCI interrupt values for SATA and IDE devices.
Without this, Ubuntu setup cannot read the CD-ROM.
3) Use 00 for unused PIC mode routing entries rather than 1F.
This is for consistency with the APIC mode table.
Thanks,
Scott
diff --git a/src/mainboard/asrock/e350m1/mptable.c b/src/mainboard/asrock/e350m1/mptable.c
index 6444be5..f45385e 100644
--- a/src/mainboard/asrock/e350m1/mptable.c
+++ b/src/mainboard/asrock/e350m1/mptable.c
@@ -35,6 +35,7 @@ extern u32 apicid_sb800;
extern u32 bus_type[256];
extern u32 sbdn_sb800;
+// SB800 interrupt routing register values: APIC mode
u8 intr_data[] = {
[0x00] = 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17, /* INTA# - INTH# */
[0x08] = 0x00,0x00,0x00,0x00,0x1F,0x1F,0x1F,0x1F, /* Misc-nil,0,1,2, INT from Serial irq */
@@ -45,6 +46,20 @@ u8 intr_data[] = {
0x10,0x11,0x12,0x13
};
+// SB800 interrupt routing register values: PIC mode
+u8 intr_data_pic[] = {
+ 0x0B, 0x0A, 0x0B, 0x0A, 0x1F, 0x1F, 0x1F, 0x1F, // 0x00
+ 0x00, 0xF1, 0x00, 0x00, 0x1F, 0x1F, 0x1F, 0x1F, // 0x08
+ 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00, // 0x10
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x18
+ 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00, 0x00, // 0x20
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x28
+ 0x0B, 0x0A, 0x0B, 0x0A, 0x0B, 0x0A, 0x0B, 0x00, // 0x30
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x38
+ 0x0A, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x40
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x48
+ 0x0B, 0x0A, 0x0B, 0x0A}; // 0x50
+
static void *smp_write_config_table(void *v)
{
struct mp_config_table *mc;
@@ -75,6 +90,12 @@ static void *smp_write_config_table(void *v)
outb(intr_data[byte], 0xC01);
}
+ // program the SB800 PIC mode interrupt routing register values
+ for (byte = 0x0; byte < sizeof(intr_data_pic); byte ++) {
+ outb(byte, 0xC00);
+ outb(intr_data_pic[byte], 0xC01);
+ }
+
/* I/O Ints: Type Polarity Trigger Bus ID IRQ APIC ID PIN# */
#define IO_LOCAL_INT(type, intr, apicid, pin) \
smp_write_lintsrc(mc, (type), MP_IRQ_TRIGGER_EDGE | MP_IRQ_POLARITY_HIGH, bus_isa, (intr), (apicid), (pin));
@@ -84,12 +105,8 @@ static void *smp_write_config_table(void *v)
/* PCI interrupts are level triggered, and are
* associated with a specific bus/device/function tuple.
*/
-#if !CONFIG_GENERATE_ACPI_TABLES
#define PCI_INT(bus, dev, fn, pin) \
- smp_write_intsrc(mc, mp_INT, MP_IRQ_TRIGGER_LEVEL|MP_IRQ_POLARITY_LOW, (bus), (((dev)<<2)|(fn)), apicid_sb800, (pin))
-#else
-#define PCI_INT(bus, dev, fn, pin)
-#endif
+ smp_write_intsrc(mc, mp_INT, MP_IRQ_TRIGGER_LEVEL|MP_IRQ_POLARITY_LOW, (bus), (((dev)<<2)|(fn)), apicid_sb800, (pin))
/* APU Internal Graphic Device*/
PCI_INT(0x0, 0x01, 0x0, intr_data[0x02]);
@@ -149,6 +166,25 @@ static void *smp_write_config_table(void *v)
IO_LOCAL_INT(mp_NMI, 0x0, MP_APIC_ALL, 0x1);
/* There is no extension information... */
+ // program interrupt line registers for legacy OS use
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x01, 0)), 0x3C, 0x0B);
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x01, 1)), 0x3C, 0x0A);
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x04, 0)), 0x3C, 0x0B);
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x11, 0)), 0x3C, 0x0A);
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x12, 0)), 0x3C, 0x0B);
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x12, 2)), 0x3C, 0x0A);
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x13, 0)), 0x3C, 0x0B);
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x13, 2)), 0x3C, 0x0A);
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x14, 1)), 0x3C, 0x0A);
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x14, 2)), 0x3C, 0x0B);
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x14, 5)), 0x3C, 0x0B);
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x16, 0)), 0x3C, 0x0B);
+ pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x16, 2)), 0x3C, 0x0A);
+ pci_write_config32(dev_find_slot(3, PCI_DEVFN(0x00, 0)), 0x3C, 0x0B);
+
+ // program slave PIC edge-level control register
+ outb (0x0C, 0x4D1);
+
/* Compute the checksums */
return mptable_finalize(mc);
}
-------------- next part --------------
A non-text attachment was scrubbed...
Name: legacy-interrupts-002.patch
Type: application/octet-stream
Size: 4082 bytes
Desc: not available
URL: <http://www.coreboot.org/pipermail/coreboot/attachments/20140508/643e2413/attachment.obj>
More information about the coreboot
mailing list