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Message-Id: <20210323221430.3735147-3-laurent@vivier.eu>
Date: Tue, 23 Mar 2021 23:14:30 +0100
From: Laurent Vivier <laurent@...ier.eu>
To: linux-kernel@...r.kernel.org
Cc: linux-m68k@...ts.linux-m68k.org,
Geert Uytterhoeven <geert@...ux-m68k.org>,
linux-rtc@...r.kernel.org, Alessandro Zummo <a.zummo@...ertech.it>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Laurent Vivier <laurent@...ier.eu>
Subject: [PATCH 2/2] m68k: introduce a virtual m68k machine
This machine allows to have up to 3.2 GiB and 128 Virtio devices.
It is based on android goldfish devices.
Signed-off-by: Laurent Vivier <laurent@...ier.eu>
---
arch/m68k/Kbuild | 1 +
arch/m68k/Kconfig.machine | 17 +++
arch/m68k/configs/virt_defconfig | 93 ++++++++++++++++
arch/m68k/include/asm/irq.h | 3 +-
arch/m68k/include/asm/pgtable_mm.h | 7 ++
arch/m68k/include/asm/setup.h | 44 ++++++--
arch/m68k/include/asm/virt.h | 26 +++++
arch/m68k/include/uapi/asm/bootinfo-virt.h | 18 ++++
arch/m68k/include/uapi/asm/bootinfo.h | 1 +
arch/m68k/kernel/Makefile | 1 +
arch/m68k/kernel/head.S | 30 ++++++
arch/m68k/kernel/setup_mm.c | 9 ++
arch/m68k/mm/kmap.c | 20 ++--
arch/m68k/virt/Makefile | 6 ++
arch/m68k/virt/config.c | 118 +++++++++++++++++++++
arch/m68k/virt/ints.c | 110 +++++++++++++++++++
arch/m68k/virt/platform.c | 80 ++++++++++++++
arch/m68k/virt/timer.c | 91 ++++++++++++++++
18 files changed, 658 insertions(+), 17 deletions(-)
create mode 100644 arch/m68k/configs/virt_defconfig
create mode 100644 arch/m68k/include/asm/virt.h
create mode 100644 arch/m68k/include/uapi/asm/bootinfo-virt.h
create mode 100644 arch/m68k/virt/Makefile
create mode 100644 arch/m68k/virt/config.c
create mode 100644 arch/m68k/virt/ints.c
create mode 100644 arch/m68k/virt/platform.c
create mode 100644 arch/m68k/virt/timer.c
diff --git a/arch/m68k/Kbuild b/arch/m68k/Kbuild
index 18abb35c26a1..7762af9f6def 100644
--- a/arch/m68k/Kbuild
+++ b/arch/m68k/Kbuild
@@ -17,3 +17,4 @@ obj-$(CONFIG_M68060) += ifpsp060/
obj-$(CONFIG_M68KFPU_EMU) += math-emu/
obj-$(CONFIG_M68000) += 68000/
obj-$(CONFIG_COLDFIRE) += coldfire/
+obj-$(CONFIG_VIRT) += virt/
diff --git a/arch/m68k/Kconfig.machine b/arch/m68k/Kconfig.machine
index 4d59ec2f5b8d..71d9d7b69ed1 100644
--- a/arch/m68k/Kconfig.machine
+++ b/arch/m68k/Kconfig.machine
@@ -145,6 +145,23 @@ config SUN3
If you don't want to compile a kernel exclusively for a Sun 3, say N.
+config VIRT
+ bool "Virtual M68k Machine support"
+ depends on MMU
+ select MMU_MOTOROLA if MMU
+ select M68040
+ select LEGACY_TIMER_TICK
+ select VIRTIO_MENU
+ select VIRTIO_MMIO
+ select GOLDFISH
+ select TTY
+ select GOLDFISH_TTY
+ select RTC_CLASS
+ select RTC_DRV_GOLDFISH
+ help
+ This options enable a pure virtual machine based on m68k,
+ VIRTIO MMIO devices and GOLDFISH interfaces (TTY, RTC, PIC)
+
config PILOT
bool
diff --git a/arch/m68k/configs/virt_defconfig b/arch/m68k/configs/virt_defconfig
new file mode 100644
index 000000000000..51842acd5434
--- /dev/null
+++ b/arch/m68k/configs/virt_defconfig
@@ -0,0 +1,93 @@
+CONFIG_M68K=y
+CONFIG_M68040=y
+CONFIG_VIRT=y
+CONFIG_DEVTMPFS=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_TMPFS_XATTR=y
+CONFIG_UNIX=y
+CONFIG_UNIX98_PTYS=y
+CONFIG_AUTOFS_FS=y
+CONFIG_SYSFS=y
+CONFIG_SYSVIPC=y
+CONFIG_SYSVIPC_SYSCTL=y
+CONFIG_SYSCTL=y
+CONFIG_SGETMASK_SYSCALL=y
+CONFIG_SYSFS_SYSCALL=y
+CONFIG_ADVISE_SYSCALLS=y
+CONFIG_EXT4_FS=y
+CONFIG_SHMEM=y
+CONFIG_CGROUPS=y
+CONFIG_BLK_CGROUP=y
+CONFIG_CGROUP_SCHED=y
+CONFIG_CGROUP_PIDS=y
+CONFIG_CGROUP_RDMA=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_CGROUP_NET_PRIO=y
+CONFIG_CGROUP_NET_CLASSID=y
+CONFIG_PARTITION_ADVANCED=y
+CONFIG_AMIGA_PARTITION=y
+CONFIG_ATARI_PARTITION=y
+CONFIG_MAC_PARTITION=y
+CONFIG_MSDOS_PARTITION=y
+CONFIG_BSD_DISKLABEL=y
+CONFIG_MINIX_SUBPARTITION=y
+CONFIG_SOLARIS_X86_PARTITION=y
+CONFIG_UNIXWARE_DISKLABEL=y
+CONFIG_LDM_PARTITION=y
+CONFIG_LDM_DEBUG=y
+CONFIG_SUN_PARTITION=y
+CONFIG_EFI_PARTITION=y
+CONFIG_SYSV68_PARTITION=y
+CONFIG_BLK_MQ_VIRTIO=y
+CONFIG_INET=y
+CONFIG_PACKET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_NETDEVICES=y
+CONFIG_NET=y
+CONFIG_NET_CORE=y
+CONFIG_NET_9P=y
+CONFIG_NET_9P_VIRTIO=y
+CONFIG_NETWORK_FILESYSTEMS=y
+CONFIG_ETHTOOL_NETLINK=y
+CONFIG_9P_FS=y
+CONFIG_9P_FS_POSIX_ACL=y
+CONFIG_9P_FS_SECURITY=y
+CONFIG_ISO9660_FS=y
+CONFIG_JOLIET=y
+CONFIG_ZISOFS=y
+CONFIG_UDF_FS=y
+CONFIG_BLOCK=y
+CONFIG_BLK_DEV=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_SR=y
+CONFIG_VIRTIO_BLK=y
+CONFIG_SCSI=y
+CONFIG_SCSI_LOWLEVEL=y
+CONFIG_SCSI_VIRTIO=y
+CONFIG_VIRTIO_NET=y
+CONFIG_GOLDFISH_TTY=y
+CONFIG_GOLDFISH_TTY_EARLY_CONSOLE=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_HW_RANDOM=y
+CONFIG_HW_RANDOM_VIRTIO=y
+CONFIG_DRM=y
+CONFIG_DRM_VIRTIO_GPU=y
+CONFIG_VIRT_DRIVERS=y
+CONFIG_VIRTIO=y
+CONFIG_VIRTIO_MENU=y
+CONFIG_VIRTIO_INPUT=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_DMA_SHARED_BUFFER=y
+CONFIG_GOLDFISH=y
+CONFIG_EARLY_PRINTK=y
+CONFIG_INPUT=y
+CONFIG_INPUT_MOUSEDEV=y
+CONFIG_INPUT_KEYBOARD=y
+CONFIG_INPUT_EVDEV=y
+CONFIG_PROC_HARDWARE=y
diff --git a/arch/m68k/include/asm/irq.h b/arch/m68k/include/asm/irq.h
index 91dd493791d7..7829e955ca04 100644
--- a/arch/m68k/include/asm/irq.h
+++ b/arch/m68k/include/asm/irq.h
@@ -12,7 +12,8 @@
*/
#if defined(CONFIG_COLDFIRE)
#define NR_IRQS 256
-#elif defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X)
+#elif defined(CONFIG_VME) || defined(CONFIG_SUN3) || \
+ defined(CONFIG_SUN3X) || defined(CONFIG_VIRT)
#define NR_IRQS 200
#elif defined(CONFIG_ATARI)
#define NR_IRQS 141
diff --git a/arch/m68k/include/asm/pgtable_mm.h b/arch/m68k/include/asm/pgtable_mm.h
index aca22c2c1ee2..8b9279971ff6 100644
--- a/arch/m68k/include/asm/pgtable_mm.h
+++ b/arch/m68k/include/asm/pgtable_mm.h
@@ -81,6 +81,9 @@
#elif defined(CONFIG_COLDFIRE)
#define KMAP_START 0xe0000000
#define KMAP_END 0xf0000000
+#elif defined(CONFIG_VIRT)
+#define KMAP_START 0xdf000000
+#define KMAP_END 0xff000000
#else
#define KMAP_START 0xd0000000
#define KMAP_END 0xf0000000
@@ -93,6 +96,10 @@ extern unsigned long m68k_vmalloc_end;
#elif defined(CONFIG_COLDFIRE)
#define VMALLOC_START 0xd0000000
#define VMALLOC_END 0xe0000000
+#elif defined(CONFIG_VIRT)
+#define VMALLOC_OFFSET PAGE_SIZE
+#define VMALLOC_START (((unsigned long) high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
+#define VMALLOC_END KMAP_START
#else
/* Just any arbitrary offset to the start of the vmalloc VM area: the
* current 8MB value just means that there will be a 8MB "hole" after the
diff --git a/arch/m68k/include/asm/setup.h b/arch/m68k/include/asm/setup.h
index 8f2023f8c1c4..20de7f30f484 100644
--- a/arch/m68k/include/asm/setup.h
+++ b/arch/m68k/include/asm/setup.h
@@ -37,7 +37,8 @@ extern unsigned long m68k_machtype;
#elif defined(CONFIG_ATARI) || defined(CONFIG_MAC) || defined(CONFIG_APOLLO) \
|| defined(CONFIG_MVME16x) || defined(CONFIG_BVME6000) \
|| defined(CONFIG_HP300) || defined(CONFIG_Q40) \
- || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147)
+ || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147) \
+ || defined(CONFIG_VIRT)
# define MACH_IS_AMIGA (m68k_machtype == MACH_AMIGA)
#else
# define MACH_AMIGA_ONLY
@@ -50,7 +51,8 @@ extern unsigned long m68k_machtype;
#elif defined(CONFIG_AMIGA) || defined(CONFIG_MAC) || defined(CONFIG_APOLLO) \
|| defined(CONFIG_MVME16x) || defined(CONFIG_BVME6000) \
|| defined(CONFIG_HP300) || defined(CONFIG_Q40) \
- || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147)
+ || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147) \
+ || defined(CONFIG_VIRT)
# define MACH_IS_ATARI (m68k_machtype == MACH_ATARI)
#else
# define MACH_ATARI_ONLY
@@ -63,7 +65,8 @@ extern unsigned long m68k_machtype;
#elif defined(CONFIG_AMIGA) || defined(CONFIG_ATARI) || defined(CONFIG_APOLLO) \
|| defined(CONFIG_MVME16x) || defined(CONFIG_BVME6000) \
|| defined(CONFIG_HP300) || defined(CONFIG_Q40) \
- || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147)
+ || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147) \
+ || defined(CONFIG_VIRT)
# define MACH_IS_MAC (m68k_machtype == MACH_MAC)
#else
# define MACH_MAC_ONLY
@@ -84,7 +87,8 @@ extern unsigned long m68k_machtype;
#elif defined(CONFIG_AMIGA) || defined(CONFIG_MAC) || defined(CONFIG_ATARI) \
|| defined(CONFIG_MVME16x) || defined(CONFIG_BVME6000) \
|| defined(CONFIG_HP300) || defined(CONFIG_Q40) \
- || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147)
+ || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147) \
+ || defined(CONFIG_VIRT)
# define MACH_IS_APOLLO (m68k_machtype == MACH_APOLLO)
#else
# define MACH_APOLLO_ONLY
@@ -97,7 +101,8 @@ extern unsigned long m68k_machtype;
#elif defined(CONFIG_AMIGA) || defined(CONFIG_MAC) || defined(CONFIG_ATARI) \
|| defined(CONFIG_APOLLO) || defined(CONFIG_BVME6000) \
|| defined(CONFIG_HP300) || defined(CONFIG_Q40) \
- || defined(CONFIG_SUN3X) || defined(CONFIG_MVME16x)
+ || defined(CONFIG_SUN3X) || defined(CONFIG_MVME16x) \
+ || defined(CONFIG_VIRT)
# define MACH_IS_MVME147 (m68k_machtype == MACH_MVME147)
#else
# define MACH_MVME147_ONLY
@@ -110,7 +115,8 @@ extern unsigned long m68k_machtype;
#elif defined(CONFIG_AMIGA) || defined(CONFIG_MAC) || defined(CONFIG_ATARI) \
|| defined(CONFIG_APOLLO) || defined(CONFIG_BVME6000) \
|| defined(CONFIG_HP300) || defined(CONFIG_Q40) \
- || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147)
+ || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147) \
+ || defined(CONFIG_VIRT)
# define MACH_IS_MVME16x (m68k_machtype == MACH_MVME16x)
#else
# define MACH_MVME16x_ONLY
@@ -123,7 +129,8 @@ extern unsigned long m68k_machtype;
#elif defined(CONFIG_AMIGA) || defined(CONFIG_MAC) || defined(CONFIG_ATARI) \
|| defined(CONFIG_APOLLO) || defined(CONFIG_MVME16x) \
|| defined(CONFIG_HP300) || defined(CONFIG_Q40) \
- || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147)
+ || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147) \
+ || defined(CONFIG_VIRT)
# define MACH_IS_BVME6000 (m68k_machtype == MACH_BVME6000)
#else
# define MACH_BVME6000_ONLY
@@ -136,7 +143,8 @@ extern unsigned long m68k_machtype;
#elif defined(CONFIG_AMIGA) || defined(CONFIG_MAC) || defined(CONFIG_ATARI) \
|| defined(CONFIG_APOLLO) || defined(CONFIG_MVME16x) \
|| defined(CONFIG_BVME6000) || defined(CONFIG_Q40) \
- || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147)
+ || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147) \
+ || defined(CONFIG_VIRT)
# define MACH_IS_HP300 (m68k_machtype == MACH_HP300)
#else
# define MACH_HP300_ONLY
@@ -149,7 +157,8 @@ extern unsigned long m68k_machtype;
#elif defined(CONFIG_AMIGA) || defined(CONFIG_MAC) || defined(CONFIG_ATARI) \
|| defined(CONFIG_APOLLO) || defined(CONFIG_MVME16x) \
|| defined(CONFIG_BVME6000) || defined(CONFIG_HP300) \
- || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147)
+ || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147) \
+ || defined(CONFIG_VIRT)
# define MACH_IS_Q40 (m68k_machtype == MACH_Q40)
#else
# define MACH_Q40_ONLY
@@ -162,7 +171,8 @@ extern unsigned long m68k_machtype;
#elif defined(CONFIG_AMIGA) || defined(CONFIG_MAC) || defined(CONFIG_ATARI) \
|| defined(CONFIG_APOLLO) || defined(CONFIG_MVME16x) \
|| defined(CONFIG_BVME6000) || defined(CONFIG_HP300) \
- || defined(CONFIG_Q40) || defined(CONFIG_MVME147)
+ || defined(CONFIG_Q40) || defined(CONFIG_MVME147) \
+ || defined(CONFIG_VIRT)
# define MACH_IS_SUN3X (m68k_machtype == MACH_SUN3X)
#else
# define CONFIG_SUN3X_ONLY
@@ -170,6 +180,20 @@ extern unsigned long m68k_machtype;
# define MACH_TYPE (MACH_SUN3X)
#endif
+#if !defined(CONFIG_VIRT)
+# define MACH_IS_VIRT (0)
+#elif defined(CONFIG_AMIGA) || defined(CONFIG_ATARI) || defined(CONFIG_APOLLO) \
+ || defined(CONFIG_MVME16x) || defined(CONFIG_BVME6000) \
+ || defined(CONFIG_HP300) || defined(CONFIG_Q40) \
+ || defined(CONFIG_SUN3X) || defined(CONFIG_MVME147) \
+ || defined(CONFIG_MAC)
+# define MACH_IS_VIRT (m68k_machtype == MACH_VIRT)
+#else
+# define MACH_VIRTONLY
+# define MACH_IS_VIRT (1)
+# define MACH_TYPE (MACH_VIRT)
+#endif
+
#ifndef MACH_TYPE
# define MACH_TYPE (m68k_machtype)
#endif
diff --git a/arch/m68k/include/asm/virt.h b/arch/m68k/include/asm/virt.h
new file mode 100644
index 000000000000..2795a70f709b
--- /dev/null
+++ b/arch/m68k/include/asm/virt.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_VIRT_H
+#define __ASM_VIRT_H
+
+#define NUM_VIRT_SOURCES 200
+
+struct virt_booter_device_data {
+ unsigned long mmio;
+ unsigned long irq;
+};
+
+struct virt_booter_data {
+ unsigned long qemu_version;
+ struct virt_booter_device_data pic;
+ struct virt_booter_device_data rtc;
+ struct virt_booter_device_data tty;
+ struct virt_booter_device_data ctrl;
+ struct virt_booter_device_data virtio;
+};
+
+extern struct virt_booter_data virt_bi_data;
+
+extern void __init virt_init_IRQ(void);
+extern void __init virt_sched_init(void);
+
+#endif
diff --git a/arch/m68k/include/uapi/asm/bootinfo-virt.h b/arch/m68k/include/uapi/asm/bootinfo-virt.h
new file mode 100644
index 000000000000..ab17fd9d200d
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/bootinfo-virt.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * asm/bootinfo-virt.h -- Virtual-m68k-specific boot information definitions
+ */
+
+#ifndef _UAPI_ASM_M68K_BOOTINFO_VIRT_H
+#define _UAPI_ASM_M68K_BOOTINFO_VIRT_H
+
+#define BI_VIRT_QEMU_VERSION 0x8000
+#define BI_VIRT_GF_PIC_BASE 0x8001
+#define BI_VIRT_GF_RTC_BASE 0x8002
+#define BI_VIRT_GF_TTY_BASE 0x8003
+#define BI_VIRT_VIRTIO_BASE 0x8004
+#define BI_VIRT_CTRL_BASE 0x8005
+
+#define VIRT_BOOTI_VERSION MK_BI_VERSION(2, 0)
+
+#endif /* _UAPI_ASM_M68K_BOOTINFO_MAC_H */
diff --git a/arch/m68k/include/uapi/asm/bootinfo.h b/arch/m68k/include/uapi/asm/bootinfo.h
index 38d3140381fa..203d9cbf9630 100644
--- a/arch/m68k/include/uapi/asm/bootinfo.h
+++ b/arch/m68k/include/uapi/asm/bootinfo.h
@@ -83,6 +83,7 @@ struct mem_info {
#define MACH_SUN3X 11
#define MACH_M54XX 12
#define MACH_M5441X 13
+#define MACH_VIRT 14
/*
diff --git a/arch/m68k/kernel/Makefile b/arch/m68k/kernel/Makefile
index dbac7f8743fc..c0833da6a2ca 100644
--- a/arch/m68k/kernel/Makefile
+++ b/arch/m68k/kernel/Makefile
@@ -11,6 +11,7 @@ extra-$(CONFIG_VME) := head.o
extra-$(CONFIG_HP300) := head.o
extra-$(CONFIG_Q40) := head.o
extra-$(CONFIG_SUN3X) := head.o
+extra-$(CONFIG_VIRT) := head.o
extra-$(CONFIG_SUN3) := sun3-head.o
extra-y += vmlinux.lds
diff --git a/arch/m68k/kernel/head.S b/arch/m68k/kernel/head.S
index 493c95db0e51..d4a4bbecf6c0 100644
--- a/arch/m68k/kernel/head.S
+++ b/arch/m68k/kernel/head.S
@@ -262,6 +262,7 @@
#include <asm/bootinfo-hp300.h>
#include <asm/bootinfo-mac.h>
#include <asm/bootinfo-q40.h>
+#include <asm/bootinfo-virt.h>
#include <asm/bootinfo-vme.h>
#include <asm/setup.h>
#include <asm/entry.h>
@@ -534,6 +535,7 @@ func_define putn,1
#define is_not_apollo(lab) cmpl &MACH_APOLLO,%pc@(m68k_machtype); jne lab
#define is_not_q40(lab) cmpl &MACH_Q40,%pc@(m68k_machtype); jne lab
#define is_not_sun3x(lab) cmpl &MACH_SUN3X,%pc@(m68k_machtype); jne lab
+#define is_not_virt(lab) cmpl &MACH_VIRT,%pc@(m68k_machtype); jne lab
#define hasnt_leds(lab) cmpl &MACH_HP300,%pc@(m68k_machtype); \
jeq 42f; \
@@ -647,6 +649,14 @@ ENTRY(__start)
L(test_notmac):
#endif /* CONFIG_MAC */
+#ifdef CONFIG_VIRT
+ is_not_virt(L(test_notvirt))
+
+ get_bi_record BI_VIRT_GF_TTY_BASE
+ lea %pc@(L(virt_gf_tty_base)),%a1
+ movel %a0@,%a1@
+L(test_notvirt):
+#endif /* CONFIG_VIRT */
/*
* There are ultimately two pieces of information we want for all kinds of
@@ -1237,6 +1247,13 @@ L(mmu_init_not_mac):
L(notsun3x):
#endif
+#ifdef CONFIG_VIRT
+ is_not_virt(L(novirt))
+ mmu_map_tt #1,#0xFF000000,#0x01000000,#_PAGE_NOCACHE_S
+ jbra L(mmu_init_done)
+L(novirt):
+#endif
+
#ifdef CONFIG_APOLLO
is_not_apollo(L(notapollo))
@@ -3186,6 +3203,13 @@ func_start serial_putc,%d0/%d1/%a0/%a1
3:
#endif
+#ifdef CONFIG_VIRT
+ is_not_virt(L(serial_putc_done))
+
+ movel L(virt_gf_tty_base),%a1
+ moveb %d0,%a1@(GF_PUT_CHAR)
+#endif
+
L(serial_putc_done):
func_return serial_putc
@@ -3865,3 +3889,9 @@ q40_mem_cptr:
L(q40_do_debug):
.long 0
#endif
+
+#if defined(CONFIG_VIRT)
+GF_PUT_CHAR = 0x00
+L(virt_gf_tty_base):
+ .long 0
+#endif /* CONFIG_VIRT */
diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
index 017bac3aab80..b628d0a1f3f1 100644
--- a/arch/m68k/kernel/setup_mm.c
+++ b/arch/m68k/kernel/setup_mm.c
@@ -122,6 +122,7 @@ extern int mvme16x_parse_bootinfo(const struct bi_record *);
extern int mvme147_parse_bootinfo(const struct bi_record *);
extern int hp300_parse_bootinfo(const struct bi_record *);
extern int apollo_parse_bootinfo(const struct bi_record *);
+extern int virt_parse_bootinfo(const struct bi_record *);
extern void config_amiga(void);
extern void config_atari(void);
@@ -134,6 +135,7 @@ extern void config_bvme6000(void);
extern void config_hp300(void);
extern void config_q40(void);
extern void config_sun3x(void);
+extern void config_virt(void);
#define MASK_256K 0xfffc0000
@@ -203,6 +205,8 @@ static void __init m68k_parse_bootinfo(const struct bi_record *record)
unknown = hp300_parse_bootinfo(record);
else if (MACH_IS_APOLLO)
unknown = apollo_parse_bootinfo(record);
+ else if (MACH_IS_VIRT)
+ unknown = virt_parse_bootinfo(record);
else
unknown = 1;
}
@@ -336,6 +340,11 @@ void __init setup_arch(char **cmdline_p)
cf_mmu_context_init();
config_BSP(NULL, 0);
break;
+#endif
+#ifdef CONFIG_VIRT
+ case MACH_VIRT:
+ config_virt();
+ break;
#endif
default:
panic("No configuration setup");
diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c
index 1269d513b221..41c72f50c0a2 100644
--- a/arch/m68k/mm/kmap.c
+++ b/arch/m68k/mm/kmap.c
@@ -180,6 +180,12 @@ void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cachefla
return (void __iomem *)physaddr;
}
#endif
+#ifdef CONFIG_VIRT
+ if (MACH_IS_VIRT) {
+ if (physaddr >= 0xff000000 && cacheflag == IOMAP_NOCACHE_SER)
+ return (void __iomem *)physaddr;
+ }
+#endif
#ifdef CONFIG_COLDFIRE
if (__cf_internalio(physaddr))
return (void __iomem *) physaddr;
@@ -293,18 +299,20 @@ EXPORT_SYMBOL(__ioremap);
*/
void iounmap(void __iomem *addr)
{
-#ifdef CONFIG_AMIGA
- if ((!MACH_IS_AMIGA) ||
- (((unsigned long)addr < 0x40000000) ||
- ((unsigned long)addr > 0x60000000)))
- free_io_area((__force void *)addr);
+#if defined(CONFIG_AMIGA) || defined(CONFIG_VIRT)
+ if (MACH_IS_AMIGA &&
+ ((unsigned long)addr >= 0x40000000) &&
+ ((unsigned long)addr < 0x60000000))
+ return;
+ if (MACH_IS_VIRT && (unsigned long)addr >= 0xff000000)
+ return;
#else
#ifdef CONFIG_COLDFIRE
if (cf_internalio(addr))
return;
#endif
- free_io_area((__force void *)addr);
#endif
+ free_io_area((__force void *)addr);
}
EXPORT_SYMBOL(iounmap);
diff --git a/arch/m68k/virt/Makefile b/arch/m68k/virt/Makefile
new file mode 100644
index 000000000000..40420fc886bb
--- /dev/null
+++ b/arch/m68k/virt/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for Linux arch/m68k/virt source directory
+#
+
+obj-y := config.o ints.o platform.o timer.o
diff --git a/arch/m68k/virt/config.c b/arch/m68k/virt/config.c
new file mode 100644
index 000000000000..ea22eed73a90
--- /dev/null
+++ b/arch/m68k/virt/config.c
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/serial_core.h>
+
+#include <asm/bootinfo.h>
+#include <asm/bootinfo-virt.h>
+#include <asm/byteorder.h>
+
+#include <asm/machdep.h>
+#include <asm/virt.h>
+
+struct virt_booter_data virt_bi_data;
+
+struct virt_ctrl {
+ u32 features;
+ u32 cmd;
+};
+
+enum {
+ CMD_NOOP,
+ CMD_RESET,
+ CMD_HALT,
+ CMD_PANIC,
+};
+
+#define virt_ctrl ((volatile struct virt_ctrl *)virt_bi_data.ctrl.mmio)
+
+static void virt_get_model(char *str)
+{
+ /* str is 80 characters long */
+ sprintf(str, "QEMU Virtual M68K Machine (%d.%d.%d)",
+ (u8)(virt_bi_data.qemu_version >> 24),
+ (u8)(virt_bi_data.qemu_version >> 16),
+ (u8)(virt_bi_data.qemu_version >> 8));
+}
+
+extern void show_registers(struct pt_regs *);
+
+static void virt_halt(void)
+{
+ virt_ctrl->cmd = CMD_HALT;
+ local_irq_disable();
+ while (1)
+ ;
+}
+
+static void virt_reset(void)
+{
+ virt_ctrl->cmd = CMD_RESET;
+ local_irq_disable();
+ while (1)
+ ;
+}
+
+/*
+ * Parse a virtual-m68k-specific record in the bootinfo
+ */
+
+int __init virt_parse_bootinfo(const struct bi_record *record)
+{
+ int unknown = 0;
+ const void *data = record->data;
+
+ switch (be16_to_cpu(record->tag)) {
+ case BI_VIRT_QEMU_VERSION:
+ virt_bi_data.qemu_version = be32_to_cpup(data);
+ break;
+ case BI_VIRT_GF_PIC_BASE:
+ virt_bi_data.pic.mmio = be32_to_cpup(data);
+ data += 4;
+ virt_bi_data.pic.irq = be32_to_cpup(data);
+ break;
+ case BI_VIRT_GF_RTC_BASE:
+ virt_bi_data.rtc.mmio = be32_to_cpup(data);
+ data += 4;
+ virt_bi_data.rtc.irq = be32_to_cpup(data);
+ break;
+ case BI_VIRT_GF_TTY_BASE:
+ virt_bi_data.tty.mmio = be32_to_cpup(data);
+ data += 4;
+ virt_bi_data.tty.irq = be32_to_cpup(data);
+ break;
+ case BI_VIRT_CTRL_BASE:
+ virt_bi_data.ctrl.mmio = be32_to_cpup(data);
+ data += 4;
+ virt_bi_data.ctrl.irq = be32_to_cpup(data);
+ break;
+ case BI_VIRT_VIRTIO_BASE:
+ virt_bi_data.virtio.mmio = be32_to_cpup(data);
+ data += 4;
+ virt_bi_data.virtio.irq = be32_to_cpup(data);
+ break;
+ default:
+ unknown = 1;
+ break;
+ }
+ return unknown;
+}
+
+void __init config_virt(void)
+{
+ char earlycon[24];
+
+ if (!MACH_IS_VIRT)
+ pr_err("ERROR: no Virtual M68k Machine, but %s called!!\n",
+ __func__);
+
+ snprintf(earlycon, sizeof(earlycon), "early_gf_tty,0x%08lx",
+ virt_bi_data.tty.mmio);
+ setup_earlycon(earlycon);
+
+ mach_init_IRQ = virt_init_IRQ;
+ mach_sched_init = virt_sched_init;
+ mach_get_model = virt_get_model;
+ mach_reset = virt_reset;
+ mach_halt = virt_halt;
+ mach_power_off = virt_halt;
+}
diff --git a/arch/m68k/virt/ints.c b/arch/m68k/virt/ints.c
new file mode 100644
index 000000000000..aa94cb3b6d96
--- /dev/null
+++ b/arch/m68k/virt/ints.c
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/sched/debug.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+
+#include <asm/virt.h>
+#include <asm/irq.h>
+#include <asm/hwtest.h>
+#include <asm/irq_regs.h>
+
+struct goldfish_pic {
+ u32 status;
+ u32 irq_pending;
+ u32 irq_diable_all;
+ u32 disable;
+ u32 enable;
+ u32 pad[1019];
+};
+
+extern void show_registers(struct pt_regs *);
+
+#define gf_pic ((volatile struct goldfish_pic *)virt_bi_data.pic.mmio)
+
+#define GF_PIC(irq) (gf_pic[(irq - IRQ_USER) / 32])
+#define GF_IRQ(irq) ((irq - IRQ_USER) % 32)
+
+static void virt_irq_enable(struct irq_data *data)
+{
+ GF_PIC(data->irq).enable = 1 << GF_IRQ(data->irq);
+}
+
+static void virt_irq_disable(struct irq_data *data)
+{
+ GF_PIC(data->irq).disable = 1 << GF_IRQ(data->irq);
+}
+
+static unsigned int virt_irq_startup(struct irq_data *data)
+{
+ GF_PIC(data->irq).enable = 1 << GF_IRQ(data->irq);
+ return 0;
+}
+
+static void virt_irq_shutdown(struct irq_data *data)
+{
+ GF_PIC(data->irq).disable = 1 << GF_IRQ(data->irq);
+}
+
+static volatile int in_nmi;
+
+irqreturn_t virt_nmi_handler(int irq, void *dev_id)
+{
+ if (in_nmi)
+ return IRQ_HANDLED;
+ in_nmi = 1;
+
+ pr_info("Non-Maskable Interrupt\n");
+ show_registers(get_irq_regs());
+
+ in_nmi = 0;
+ return IRQ_HANDLED;
+}
+
+static struct irq_chip virt_irq_chip = {
+ .name = "virt",
+ .irq_enable = virt_irq_enable,
+ .irq_disable = virt_irq_disable,
+ .irq_startup = virt_irq_startup,
+ .irq_shutdown = virt_irq_shutdown,
+};
+
+static void goldfish_pic_irq(struct irq_desc *desc)
+{
+ u32 irq_pending, irq_bit;
+ int irq_num;
+
+ irq_pending = gf_pic[desc->irq_data.irq - 1].irq_pending;
+ irq_num = IRQ_USER + (desc->irq_data.irq - 1) * 32;
+ irq_bit = 1;
+
+ do {
+ if (irq_pending & irq_bit) {
+ generic_handle_irq(irq_num);
+ irq_pending &= ~irq_bit;
+ }
+ ++irq_num;
+ irq_bit <<= 1;
+ } while (irq_pending);
+}
+
+void __init virt_init_IRQ(void)
+{
+ int i;
+
+ m68k_setup_irq_controller(&virt_irq_chip, handle_simple_irq, IRQ_USER,
+ NUM_VIRT_SOURCES - IRQ_USER);
+
+ for (i = 0; i < 6; i++) {
+ irq_set_chained_handler(virt_bi_data.pic.irq + i,
+ goldfish_pic_irq);
+ }
+
+ if (request_irq(IRQ_AUTO_7, virt_nmi_handler, 0, "NMI",
+ virt_nmi_handler))
+ pr_err("Couldn't register NMI\n");
+}
diff --git a/arch/m68k/virt/platform.c b/arch/m68k/virt/platform.c
new file mode 100644
index 000000000000..311d53dec487
--- /dev/null
+++ b/arch/m68k/virt/platform.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <asm/virt.h>
+#include <asm/irq.h>
+
+static struct platform_device virt_m68k_goldfish_tty = {
+ .name = "goldfish_tty",
+ .id = PLATFORM_DEVID_NONE,
+ .num_resources = 2,
+ .resource = (struct resource [2]) { },
+};
+static struct platform_device virt_m68k_goldfish_rtc = {
+ .name = "goldfish_rtc",
+ .id = PLATFORM_DEVID_NONE,
+ .num_resources = 2,
+ .resource = (struct resource [2]) { },
+};
+
+#define VIRTIO_BUS_NB 128
+static struct platform_device virt_m68k_virtio_mmio_device[VIRTIO_BUS_NB];
+static struct resource virt_m68k_virtio_mmio_resources[VIRTIO_BUS_NB][2];
+
+static int __init virt_platform_init(void)
+{
+ int err;
+ int i;
+ extern unsigned long min_low_pfn;
+
+ if (!MACH_IS_VIRT)
+ return -ENODEV;
+
+ min_low_pfn = 0;
+
+ virt_m68k_goldfish_tty.resource[0].flags = IORESOURCE_MEM;
+ virt_m68k_goldfish_tty.resource[0].start = virt_bi_data.tty.mmio;
+ virt_m68k_goldfish_tty.resource[0].end = virt_bi_data.tty.mmio;
+ virt_m68k_goldfish_tty.resource[1].flags = IORESOURCE_IRQ;
+ virt_m68k_goldfish_tty.resource[1].start = virt_bi_data.tty.irq;
+ virt_m68k_goldfish_tty.resource[1].end = virt_bi_data.tty.irq;
+
+ err = platform_device_register(&virt_m68k_goldfish_tty);
+ if (err)
+ return err;
+
+ virt_m68k_goldfish_rtc.resource[0].flags = IORESOURCE_MEM;
+ virt_m68k_goldfish_rtc.resource[0].start = virt_bi_data.rtc.mmio + 0x1000;
+ virt_m68k_goldfish_rtc.resource[0].end = virt_bi_data.rtc.mmio + 0x1fff;
+ virt_m68k_goldfish_rtc.resource[1].flags = IORESOURCE_IRQ;
+ virt_m68k_goldfish_rtc.resource[1].start = virt_bi_data.rtc.irq + 1;
+ virt_m68k_goldfish_rtc.resource[1].end = virt_bi_data.rtc.irq + 1;
+ err = platform_device_register(&virt_m68k_goldfish_rtc);
+ if (err)
+ return err;
+
+ for (i = 0; i < VIRTIO_BUS_NB; i++) {
+ virt_m68k_virtio_mmio_device[i].name = "virtio-mmio";
+ virt_m68k_virtio_mmio_device[i].id = i;
+ virt_m68k_virtio_mmio_device[i].num_resources = 2;
+ virt_m68k_virtio_mmio_device[i].resource = virt_m68k_virtio_mmio_resources[i];
+
+ virt_m68k_virtio_mmio_resources[i][0].flags = IORESOURCE_MEM;
+ virt_m68k_virtio_mmio_resources[i][0].start = virt_bi_data.virtio.mmio +
+ i * 0x200;
+ virt_m68k_virtio_mmio_resources[i][0].end = virt_bi_data.virtio.mmio +
+ (i + 1) * 0x200 - 1;
+ virt_m68k_virtio_mmio_resources[i][1].flags = IORESOURCE_IRQ;
+ virt_m68k_virtio_mmio_resources[i][1].start = virt_bi_data.virtio.irq + i;
+ virt_m68k_virtio_mmio_resources[i][1].end = virt_bi_data.virtio.irq + i;
+
+ err = platform_device_register(&virt_m68k_virtio_mmio_device[i]);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+arch_initcall(virt_platform_init);
diff --git a/arch/m68k/virt/timer.c b/arch/m68k/virt/timer.c
new file mode 100644
index 000000000000..705fd53beac5
--- /dev/null
+++ b/arch/m68k/virt/timer.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/clocksource.h>
+#include <asm/virt.h>
+
+struct goldfish_timer {
+ u32 time_low;
+ u32 time_high;
+ u32 alarm_low;
+ u32 alarm_high;
+ u32 irq_enabled;
+ u32 clear_alarm;
+ u32 alarm_status;
+ u32 clear_interrupt;
+};
+
+#define gf_timer ((volatile struct goldfish_timer *)virt_bi_data.rtc.mmio)
+
+static u64 goldfish_timer_read(struct clocksource *cs)
+{
+ u64 ticks;
+
+ ticks = gf_timer->time_low;
+ ticks += (u64)gf_timer->time_high << 32;
+
+ return ticks;
+}
+
+static struct clocksource goldfish_timer = {
+ .name = "goldfish_timer",
+ .rating = 400,
+ .read = goldfish_timer_read,
+ .mask = CLOCKSOURCE_MASK(64),
+ .flags = 0,
+ .max_idle_ns = LONG_MAX,
+};
+
+static irqreturn_t golfish_timer_handler(int irq, void *dev_id)
+{
+ unsigned long flags;
+ u64 now;
+
+ local_irq_save(flags);
+ gf_timer->clear_interrupt = 1;
+
+ now = gf_timer->time_low;
+ now += (u64)gf_timer->time_high << 32;
+
+ legacy_timer_tick(1);
+
+ now += NSEC_PER_SEC / HZ;
+ gf_timer->alarm_high = now >> 32;
+ gf_timer->alarm_low = (u32)now;
+ local_irq_restore(flags);
+
+ return IRQ_HANDLED;
+}
+
+void __init virt_sched_init(void)
+{
+ u64 now;
+ static struct resource sched_res;
+
+ sched_res.name = "goldfish_timer";
+ sched_res.start = virt_bi_data.rtc.mmio;
+ sched_res.end = virt_bi_data.rtc.mmio + 0xfff;
+
+ if (request_resource(&iomem_resource, &sched_res)) {
+ pr_err("Cannot allocate goldfish-timer resource\n");
+ return;
+ }
+
+ if (request_irq(virt_bi_data.rtc.irq, golfish_timer_handler, IRQF_TIMER,
+ "timer", NULL)) {
+ pr_err("Couldn't register timer interrupt\n");
+ return;
+ }
+
+ now = gf_timer->time_low;
+ now += (u64)gf_timer->time_high << 32;
+ now += NSEC_PER_SEC / HZ;
+
+ gf_timer->clear_interrupt = 1;
+ gf_timer->alarm_high = now >> 32;
+ gf_timer->alarm_low = (u32)now;
+ gf_timer->irq_enabled = 1;
+
+ clocksource_register_hz(&goldfish_timer, NSEC_PER_SEC);
+}
--
2.30.2
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