brain-hackers_pepepper-mirror/u-boot-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/u-boot-brain synced 2024-06-09 23:36:03 +09:00
Code Issues Projects Releases Wiki Activity

x86: Reserve PCIe ECAM address range in the E820 table

Browse Source 
We should mark PCIe ECAM address range in the E820 table as reserved
otherwise kernel will not attempt to use ECAM.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2015-07-22 01:21:15 -07:00 committed by Simon Glass
parent 9830d2ebb4
commit 1ed6648be0
3 changed files with 20 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/x86/Kconfig
View File

@ -369,4 +369,14 @@ config PCIE_ECAM_BASE
assigned to PCI devices - i.e. the memory and prefetch regions, as
passed to pci_set_region().
config PCIE_ECAM_SIZE
hex
default 0x10000000
help
This is the size of memory-mapped address of PCI configuration space,
which is only available through the Enhanced Configuration Access
Mechanism (ECAM) with PCI Express. Each bus consumes 1 MiB memory,
so a default 0x10000000 size covers all of the 256 buses which is the
maximum number of PCI buses as defined by the PCI specification.
endmenu

6
arch/x86/lib/fsp/fsp_dram.c
View File

@ -77,5 +77,11 @@ unsigned install_e820_map(unsigned max_entries, struct e820entry *entries)
num_entries++;
}
/* Mark PCIe ECAM address range as reserved */
entries[num_entries].addr = CONFIG_PCIE_ECAM_BASE;
entries[num_entries].size = CONFIG_PCIE_ECAM_SIZE;
entries[num_entries].type = E820_RESERVED;
num_entries++;
return num_entries;
}

5
arch/x86/lib/zimage.c
View File

@ -61,8 +61,11 @@ __weak unsigned install_e820_map(unsigned max_entries,
entries[2].addr = ISA_END_ADDRESS;
entries[2].size = gd->ram_size - ISA_END_ADDRESS;
entries[2].type = E820_RAM;
entries[3].addr = CONFIG_PCIE_ECAM_BASE;
entries[3].size = CONFIG_PCIE_ECAM_SIZE;
entries[3].type = E820_RESERVED;
return 3;
return 4;
}
static void build_command_line(char *command_line, int auto_boot)