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x86: Move qemu CPU fixup function into its own file 

This function is specific to qemu so it seems best to keep it separate
from the generic code.

Move it out to a new file and update the condition to use if() instead of
 #ifdef

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2019-12-06 21:42:55 -07:00 committed by Bin Meng
parent 7e589bc19b
commit baaeb92c21
4 changed files with 87 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/x86/cpu/Makefile
View File

@ -54,6 +54,7 @@ obj-$(CONFIG_INTEL_QUEENSBAY) += queensbay/
obj-$(CONFIG_INTEL_TANGIER) += tangier/
obj-$(CONFIG_APIC) += lapic.o ioapic.o
obj-$(CONFIG_$(SPL_TPL_)X86_32BIT_INIT) += irq.o
obj-$(CONFIG_QFW) += qfw_cpu.o
ifndef CONFIG_$(SPL_)X86_64
obj-$(CONFIG_SMP) += mp_init.o
endif

73
arch/x86/cpu/mp_init.c
View File

@ -418,69 +418,6 @@ static int init_bsp(struct udevice **devp)
return 0;
}
#ifdef CONFIG_QFW
static int qemu_cpu_fixup(void)
{
int ret;
int cpu_num;
int cpu_online;
struct udevice *dev, *pdev;
struct cpu_platdata *plat;
char *cpu;
/* first we need to find '/cpus' */
for (device_find_first_child(dm_root(), &pdev);
pdev;
device_find_next_child(&pdev)) {
if (!strcmp(pdev->name, "cpus"))
break;
}
if (!pdev) {
printf("unable to find cpus device\n");
return -ENODEV;
}
/* calculate cpus that are already bound */
cpu_num = 0;
for (uclass_find_first_device(UCLASS_CPU, &dev);
dev;
uclass_find_next_device(&dev)) {
cpu_num++;
}
/* get actual cpu number */
cpu_online = qemu_fwcfg_online_cpus();
if (cpu_online < 0) {
printf("unable to get online cpu number: %d\n", cpu_online);
return cpu_online;
}
/* bind addtional cpus */
dev = NULL;
for (; cpu_num < cpu_online; cpu_num++) {
/*
* allocate device name here as device_bind_driver() does
* not copy device name, 8 bytes are enough for
* sizeof("cpu@") + 3 digits cpu number + '\0'
*/
cpu = malloc(8);
if (!cpu) {
printf("unable to allocate device name\n");
return -ENOMEM;
}
sprintf(cpu, "cpu@%d", cpu_num);
ret = device_bind_driver(pdev, "cpu_qemu", cpu, &dev);
if (ret) {
printf("binding cpu@%d failed: %d\n", cpu_num, ret);
return ret;
}
plat = dev_get_parent_platdata(dev);
plat->cpu_id = cpu_num;
}
return 0;
}
#endif
int mp_init(struct mp_params *p)
{
int num_aps;
@ -494,11 +431,11 @@ int mp_init(struct mp_params *p)
if (ret)
return ret;
#ifdef CONFIG_QFW
ret = qemu_cpu_fixup();
if (ret)
return ret;
#endif
if (IS_ENABLED(CONFIG_QFW)) {
ret = qemu_cpu_fixup();
if (ret)
return ret;
}
ret = init_bsp(&cpu);
if (ret) {

73
arch/x86/cpu/qfw_cpu.c Normal file
View File

@ -0,0 +1,73 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Google, Inc
*/
#include <common.h>
#include <cpu.h>
#include <dm.h>
#include <qfw.h>
#include <dm/lists.h>
#include <dm/uclass-internal.h>
#include <dm/root.h>
int qemu_cpu_fixup(void)
{
int ret;
int cpu_num;
int cpu_online;
struct udevice *dev, *pdev;
struct cpu_platdata *plat;
char *cpu;
/* first we need to find '/cpus' */
for (device_find_first_child(dm_root(), &pdev);
pdev;
device_find_next_child(&pdev)) {
if (!strcmp(pdev->name, "cpus"))
break;
}
if (!pdev) {
printf("unable to find cpus device\n");
return -ENODEV;
}
/* calculate cpus that are already bound */
cpu_num = 0;
for (uclass_find_first_device(UCLASS_CPU, &dev);
dev;
uclass_find_next_device(&dev)) {
cpu_num++;
}
/* get actual cpu number */
cpu_online = qemu_fwcfg_online_cpus();
if (cpu_online < 0) {
printf("unable to get online cpu number: %d\n", cpu_online);
return cpu_online;
}
/* bind addtional cpus */
dev = NULL;
for (; cpu_num < cpu_online; cpu_num++) {
/*
* allocate device name here as device_bind_driver() does
* not copy device name, 8 bytes are enough for
* sizeof("cpu@") + 3 digits cpu number + '\0'
*/
cpu = malloc(8);
if (!cpu) {
printf("unable to allocate device name\n");
return -ENOMEM;
}
sprintf(cpu, "cpu@%d", cpu_num);
ret = device_bind_driver(pdev, "cpu_qemu", cpu, &dev);
if (ret) {
printf("binding cpu@%d failed: %d\n", cpu_num, ret);
return ret;
}
plat = dev_get_parent_platdata(dev);
plat->cpu_id = cpu_num;
}
return 0;
}

8
include/qfw.h
View File

@ -172,4 +172,12 @@ bool qemu_fwcfg_file_iter_end(struct fw_cfg_file_iter *iter);
bool qemu_fwcfg_present(void);
bool qemu_fwcfg_dma_present(void);
/**
* qemu_cpu_fixup() - Fix up the CPUs for QEMU
*
* @return 0 if OK, -ENODEV if no CPUs, -ENOMEM if out of memory, other -ve on
* on other error
*/
int qemu_cpu_fixup(void);
#endif