parisc: Add qemu fw_cfg interface (024f5b59) · Commits · 戴 / test

arch/parisc/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -376,5 +376,6 @@ config KEXEC_FILE

		endmenu

		source "drivers/firmware/Kconfig"

		source "drivers/parisc/Kconfig"

+30 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@
		#include <linux/init.h>
		#include <linux/slab.h>
		#include <linux/mm.h>
		#include <linux/platform_device.h>
		#include <asm/hardware.h>
		#include <asm/io.h>
		#include <asm/mmzone.h>
		@@ -641,4 +642,33 @@ void __init do_device_inventory(void)
		if (pa_serialize_tlb_flushes)
		pr_info("Merced bus found: Enable PxTLB serialization.\n");
		#endif

		#if defined(CONFIG_FW_CFG_SYSFS)
		if (running_on_qemu) {
		struct resource res[3] = {0,};
		unsigned int base;

		base = ((unsigned long long) PAGE0->pad0[2] << 32)
		\| PAGE0->pad0[3]; /* SeaBIOS stored it here */

		res[0].name = "fw_cfg";
		res[0].start = base;
		res[0].end = base + 8 - 1;
		res[0].flags = IORESOURCE_MEM;

		res[1].name = "ctrl";
		res[1].start = 0;
		res[1].flags = IORESOURCE_REG;

		res[2].name = "data";
		res[2].start = 4;
		res[2].flags = IORESOURCE_REG;

		if (base) {
		pr_info("Found qemu fw_cfg interface at %#08x\n", base);
		platform_device_register_simple("fw_cfg",
		PLATFORM_DEVID_NONE, res, 3);
		}
		}
		#endif
		}