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x86: qemu: add fw_cfg support

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The QEMU fw_cfg interface allows the guest to retrieve various data
information from QEMU. For example, APCI/SMBios tables, number of online
cpus, kernel data and command line, etc.

This patch adds support for QEMU fw_cfg interface.

Signed-off-by: Miao Yan <yanmiaobest@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Miao Yan
2016-01-07 01:32:00 -08:00
committed by Bin Meng
parent ece5c37f0c
commit f60df20aa9
4 changed files with 380 additions and 1 deletions
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3
arch/x86/cpu/qemu/qemu.c
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@@ -11,6 +11,7 @@
#include <asm/processor.h>
#include <asm/arch/device.h>
#include <asm/arch/qemu.h>
#include <asm/fw_cfg.h>
static bool i440fx;
@@ -57,6 +58,8 @@ static void qemu_chipset_init(void)
x86_pci_write_config32(PCI_BDF(0, 0, 0), PCIEX_BAR,
CONFIG_PCIE_ECAM_BASE | BAR_EN);
}
qemu_fwcfg_init();
}
int arch_cpu_init(void)