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authorStefan Reinauer <reinauer@chromium.org>2012-07-31 16:47:25 -0700
committerRonald G. Minnich <rminnich@gmail.com>2012-08-04 18:05:39 +0200
commit57879c9bd1775ad7089e3ab93dd260deec87e95c (patch)
tree062977c18247febf8b11f6610af7df3ef34ba3d2 /src/devices/Makefile.inc
parent15dc3ccaab5a431b1a0b99aaba9d61457b219343 (diff)
downloadcoreboot-57879c9bd1775ad7089e3ab93dd260deec87e95c.tar.xz
Make the device tree available in the rom stage
We thought about two ways to do this change. The way we decided to try was to 1. drop all ops from devices in romstage 2. constify all devices in romstage (make them read-only) so we can compile static.c into romstage 3. the device tree "devices" can be used to read configuration from the device tree (and nothing else, really) 4. the device tree devices are accessed through struct device * in romstage only. device_t stays the typedef to int in romstage 5. Use the same static.c file in ramstage and romstage We declare structs as follows: ROMSTAGE_CONST struct bus dev_root_links[]; ROMSTAGE_CONST is const in romstage and empty in ramstage; This forces all of the device tree into the text area. So a struct looks like this: static ROMSTAGE_CONST struct device _dev21 = { #ifndef __PRE_RAM__ .ops = 0, #endif .bus = &_dev7_links[0], .path = {.type=DEVICE_PATH_PCI,{.pci={ .devfn = PCI_DEVFN(0x1c,3)}}}, .enabled = 0, .on_mainboard = 1, .subsystem_vendor = 0x1ae0, .subsystem_device = 0xc000, .link_list = NULL, .sibling = &_dev22, #ifndef __PRE_RAM__ .chip_ops = &southbridge_intel_bd82x6x_ops, #endif .chip_info = &southbridge_intel_bd82x6x_info_10, .next=&_dev22 }; Change-Id: I722454d8d3c40baf7df989f5a6891f6ba7db5727 Signed-off-by: Ronald G. Minnich <rminnich@chromium.org> Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/1398 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/devices/Makefile.inc')
-rw-r--r--src/devices/Makefile.inc2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/devices/Makefile.inc b/src/devices/Makefile.inc
index 9ffc0bb921..9a2f71e683 100644
--- a/src/devices/Makefile.inc
+++ b/src/devices/Makefile.inc
@@ -11,6 +11,8 @@ ramstage-y += pnp_device.c
ramstage-y += pci_ops.c
ramstage-y += smbus_ops.c
+romstage-y+= device_romstage.c
+
subdirs-y += oprom
ifeq ($(CONFIG_PCI_ROM_RUN),y)