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m68k updates for v6.13

Browse Source 
- Revive SCSI and early console support on MVME147,
   - Fix early kernel parameters using static keys,
   - Prevent and improve handling of kernel configurations that lack
     specific platform, CPU, or MMU support, to avoid build failures,
   - Miscellaneous fixes and improvements,
   - Defconfig updates.
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Merge tag 'm68k-for-v6.13-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k

Pull m68k updates from Geert Uytterhoeven:

 - Revive SCSI and early console support on MVME147

 - Fix early kernel parameters using static keys

 - Prevent and improve handling of kernel configurations that lack
   specific platform, CPU, or MMU support, to avoid build failures

 - Miscellaneous fixes and improvements

 - Defconfig updates

* tag 'm68k-for-v6.13-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k: defconfig: Update defconfigs for v6.12-rc1
  m68k: mvme147: Reinstate early console
  m68k: Make sure NR_IRQS is never zero
  m68k: Select M68020 as fallback for classic
  m68k: Move Sun 3 into a top-level platform option
  m68k: kernel: Use str_read_write() helper function
  m68k: Initialize jump labels early during setup_arch()
  m68k: mvme147: Fix SCSI controller IRQ numbers
  m68k: mvme147: Make mvme147_sched_init() __init
This commit is contained in:
Linus Torvalds 2024-11-18 18:00:18 -08:00
commit 9aa4c37f71
24 changed files with 102 additions and 73 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/m68k/Kconfig
View File

@ -84,24 +84,23 @@ config MMU
support by paged memory management. If unsure, say 'Y'.
config MMU_MOTOROLA
bool
def_bool MMU && M68KCLASSIC
select HAVE_PAGE_SIZE_4KB
config MMU_COLDFIRE
def_bool MMU && COLDFIRE
select HAVE_PAGE_SIZE_8KB
bool
config MMU_SUN3
bool
def_bool MMU && SUN3
select HAVE_PAGE_SIZE_8KB
depends on MMU && !MMU_MOTOROLA && !MMU_COLDFIRE
config ARCH_SUPPORTS_KEXEC
def_bool M68KCLASSIC && MMU
def_bool (M68KCLASSIC || SUN3) && MMU
config BOOTINFO_PROC
bool "Export bootinfo in procfs"
depends on KEXEC && M68KCLASSIC
depends on KEXEC && (M68KCLASSIC || SUN3)
help
Say Y to export the bootinfo used to boot the kernel in a
"bootinfo" file in procfs. This is useful with kexec.

36
arch/m68k/Kconfig.cpu
View File

@ -2,7 +2,7 @@
comment "Processor Type"
choice
prompt "CPU family support"
prompt "CPU/machine family support"
default M68KCLASSIC if MMU
default COLDFIRE if !MMU
help
@ -19,8 +19,9 @@ choice
processor, select COLDFIRE.
config M68KCLASSIC
bool "Classic M68K CPU family support"
bool "Classic M68K CPU/machine family support"
select HAVE_ARCH_PFN_VALID
select M68020 if MMU && !(M68030 || M68040 || M68060)
config COLDFIRE
bool "Coldfire CPU family support"
@ -32,13 +33,23 @@ config COLDFIRE
select HAVE_LEGACY_CLK
select HAVE_PAGE_SIZE_8KB if !MMU
config SUN3
bool "Sun3 machine support"
depends on MMU
select HAVE_ARCH_PFN_VALID
select LEGACY_TIMER_TICK
select NO_DMA
select M68020
help
This option enables support for the Sun 3 series of workstations
(3/50, 3/60, 3/1xx, 3/2xx systems). These use a classic 68020 CPU
but the custom memory management unit makes them incompatible with
all other classic m68k machines, including Sun 3x.
endchoice
if M68KCLASSIC
config M68000
def_bool y
depends on !MMU
def_bool M68KCLASSIC && !MMU
select CPU_HAS_NO_BITFIELDS
select CPU_HAS_NO_CAS
select CPU_HAS_NO_MULDIV64
@ -56,7 +67,7 @@ config M68000
a paging MMU.
config M68020
bool "68020 support"
bool "68020 support" if M68KCLASSIC
depends on MMU
select FPU
select CPU_HAS_ADDRESS_SPACES
@ -66,9 +77,10 @@ config M68020
68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
Sun 3, which provides its own version.
if M68KCLASSIC && MMU
config M68030
bool "68030 support"
depends on MMU && !MMU_SUN3
select FPU
select CPU_HAS_ADDRESS_SPACES
help
@ -78,7 +90,6 @@ config M68030
config M68040
bool "68040 support"
depends on MMU && !MMU_SUN3
select FPU
select CPU_HAS_ADDRESS_SPACES
help
@ -89,13 +100,14 @@ config M68040
config M68060
bool "68060 support"
depends on MMU && !MMU_SUN3
select FPU
select CPU_HAS_ADDRESS_SPACES
help
If you anticipate running this kernel on a computer with a MC68060
processor, say Y. Otherwise, say N.
endif # M68KCLASSIC
config M68328
bool
depends on !MMU
@ -117,8 +129,6 @@ config M68VZ328
help
Motorola 68VZ328 processor support.
endif # M68KCLASSIC
if COLDFIRE
choice
@ -325,7 +335,7 @@ comment "Processor Specific Options"
config M68KFPU_EMU
bool "Math emulation support"
depends on M68KCLASSIC && FPU
depends on (M68KCLASSIC || SUN3) && FPU
help
At some point in the future, this will cause floating-point math
instructions to be emulated by the kernel on machines that lack a

25
arch/m68k/Kconfig.machine
View File

@ -6,7 +6,6 @@ if M68KCLASSIC
config AMIGA
bool "Amiga support"
depends on MMU
select MMU_MOTOROLA if MMU
select LEGACY_TIMER_TICK
help
This option enables support for the Amiga series of computers. If
@ -16,7 +15,6 @@ config AMIGA
config ATARI
bool "Atari support"
depends on MMU
select MMU_MOTOROLA if MMU
select HAVE_ARCH_NVRAM_OPS
select LEGACY_TIMER_TICK
help
@ -31,7 +29,6 @@ config ATARI_KBD_CORE
config MAC
bool "Macintosh support"
depends on MMU
select MMU_MOTOROLA if MMU
select HAVE_ARCH_NVRAM_OPS
select HAVE_PATA_PLATFORM
select LEGACY_TIMER_TICK
@ -44,7 +41,6 @@ config MAC
config APOLLO
bool "Apollo support"
depends on MMU
select MMU_MOTOROLA if MMU
select LEGACY_TIMER_TICK
help
Say Y here if you want to run Linux on an MC680x0-based Apollo
@ -53,7 +49,6 @@ config APOLLO
config VME
bool "VME (Motorola and BVM) support"
depends on MMU
select MMU_MOTOROLA if MMU
help
Say Y here if you want to build a kernel for a 680x0 based VME
board. Boards currently supported include Motorola boards MVME147,
@ -97,7 +92,6 @@ config BVME6000
config HP300
bool "HP9000/300 and HP9000/400 support"
depends on MMU
select MMU_MOTOROLA if MMU
select LEGACY_TIMER_TICK
help
This option enables support for the HP9000/300 and HP9000/400 series
@ -110,7 +104,6 @@ config SUN3X
bool "Sun3x support"
depends on MMU
select LEGACY_TIMER_TICK
select MMU_MOTOROLA if MMU
select M68030
help
This option enables support for the Sun 3x series of workstations.
@ -124,7 +117,6 @@ config SUN3X
config Q40
bool "Q40/Q60 support"
depends on MMU
select MMU_MOTOROLA if MMU
select LEGACY_TIMER_TICK
help
The Q40 is a Motorola 68040-based successor to the Sinclair QL
@ -133,22 +125,6 @@ config Q40
Q60. Select your CPU below. For 68LC060 don't forget to enable FPU
emulation.
config SUN3
bool "Sun3 support"
depends on MMU
depends on !MMU_MOTOROLA
select MMU_SUN3 if MMU
select LEGACY_TIMER_TICK
select NO_DMA
select M68020
help
This option enables support for the Sun 3 series of workstations
(3/50, 3/60, 3/1xx, 3/2xx systems). Enabling this option requires
that all other hardware types must be disabled, as Sun 3 kernels
are incompatible with all other m68k targets (including Sun 3x!).
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
@ -157,7 +133,6 @@ config VIRT
select GOLDFISH_TIMER
select GOLDFISH_TTY
select M68040
select MMU_MOTOROLA if MMU
select RTC_CLASS
select RTC_DRV_GOLDFISH
select TTY

1
arch/m68k/configs/amiga_defconfig
View File

@ -620,6 +620,7 @@ CONFIG_KUNIT_ALL_TESTS=m
CONFIG_TEST_DHRY=m
CONFIG_TEST_MIN_HEAP=m
CONFIG_TEST_DIV64=m
CONFIG_TEST_MULDIV64=m
CONFIG_REED_SOLOMON_TEST=m
CONFIG_ATOMIC64_SELFTEST=m
CONFIG_ASYNC_RAID6_TEST=m

1
arch/m68k/configs/apollo_defconfig
View File

@ -577,6 +577,7 @@ CONFIG_KUNIT_ALL_TESTS=m
CONFIG_TEST_DHRY=m
CONFIG_TEST_MIN_HEAP=m
CONFIG_TEST_DIV64=m
CONFIG_TEST_MULDIV64=m
CONFIG_REED_SOLOMON_TEST=m
CONFIG_ATOMIC64_SELFTEST=m
CONFIG_ASYNC_RAID6_TEST=m

1
arch/m68k/configs/atari_defconfig
View File

@ -597,6 +597,7 @@ CONFIG_KUNIT_ALL_TESTS=m
CONFIG_TEST_DHRY=m
CONFIG_TEST_MIN_HEAP=m
CONFIG_TEST_DIV64=m
CONFIG_TEST_MULDIV64=m
CONFIG_REED_SOLOMON_TEST=m
CONFIG_ATOMIC64_SELFTEST=m
CONFIG_ASYNC_RAID6_TEST=m

1
arch/m68k/configs/bvme6000_defconfig
View File

@ -569,6 +569,7 @@ CONFIG_KUNIT_ALL_TESTS=m
CONFIG_TEST_DHRY=m
CONFIG_TEST_MIN_HEAP=m
CONFIG_TEST_DIV64=m
CONFIG_TEST_MULDIV64=m
CONFIG_REED_SOLOMON_TEST=m
CONFIG_ATOMIC64_SELFTEST=m
CONFIG_ASYNC_RAID6_TEST=m

1
arch/m68k/configs/hp300_defconfig
View File

@ -579,6 +579,7 @@ CONFIG_KUNIT_ALL_TESTS=m
CONFIG_TEST_DHRY=m
CONFIG_TEST_MIN_HEAP=m
CONFIG_TEST_DIV64=m
CONFIG_TEST_MULDIV64=m
CONFIG_REED_SOLOMON_TEST=m
CONFIG_ATOMIC64_SELFTEST=m
CONFIG_ASYNC_RAID6_TEST=m

1
arch/m68k/configs/mac_defconfig
View File

@ -596,6 +596,7 @@ CONFIG_KUNIT_ALL_TESTS=m
CONFIG_TEST_DHRY=m
CONFIG_TEST_MIN_HEAP=m
CONFIG_TEST_DIV64=m
CONFIG_TEST_MULDIV64=m
CONFIG_REED_SOLOMON_TEST=m
CONFIG_ATOMIC64_SELFTEST=m
CONFIG_ASYNC_RAID6_TEST=m

1
arch/m68k/configs/multi_defconfig
View File

@ -682,6 +682,7 @@ CONFIG_KUNIT_ALL_TESTS=m
CONFIG_TEST_DHRY=m
CONFIG_TEST_MIN_HEAP=m
CONFIG_TEST_DIV64=m
CONFIG_TEST_MULDIV64=m
CONFIG_REED_SOLOMON_TEST=m
CONFIG_ATOMIC64_SELFTEST=m
CONFIG_ASYNC_RAID6_TEST=m

1
arch/m68k/configs/mvme147_defconfig
View File

@ -568,6 +568,7 @@ CONFIG_KUNIT_ALL_TESTS=m
CONFIG_TEST_DHRY=m
CONFIG_TEST_MIN_HEAP=m
CONFIG_TEST_DIV64=m
CONFIG_TEST_MULDIV64=m
CONFIG_REED_SOLOMON_TEST=m
CONFIG_ATOMIC64_SELFTEST=m
CONFIG_ASYNC_RAID6_TEST=m

1
arch/m68k/configs/mvme16x_defconfig
View File

@ -569,6 +569,7 @@ CONFIG_KUNIT_ALL_TESTS=m
CONFIG_TEST_DHRY=m
CONFIG_TEST_MIN_HEAP=m
CONFIG_TEST_DIV64=m
CONFIG_TEST_MULDIV64=m
CONFIG_REED_SOLOMON_TEST=m
CONFIG_ATOMIC64_SELFTEST=m
CONFIG_ASYNC_RAID6_TEST=m

1
arch/m68k/configs/q40_defconfig
View File

@ -586,6 +586,7 @@ CONFIG_KUNIT_ALL_TESTS=m
CONFIG_TEST_DHRY=m
CONFIG_TEST_MIN_HEAP=m
CONFIG_TEST_DIV64=m
CONFIG_TEST_MULDIV64=m
CONFIG_REED_SOLOMON_TEST=m
CONFIG_ATOMIC64_SELFTEST=m
CONFIG_ASYNC_RAID6_TEST=m

1
arch/m68k/configs/sun3_defconfig
View File

@ -566,6 +566,7 @@ CONFIG_KUNIT_ALL_TESTS=m
CONFIG_TEST_DHRY=m
CONFIG_TEST_MIN_HEAP=m
CONFIG_TEST_DIV64=m
CONFIG_TEST_MULDIV64=m
CONFIG_REED_SOLOMON_TEST=m
CONFIG_ATOMIC64_SELFTEST=m
CONFIG_ASYNC_RAID6_TEST=m

1
arch/m68k/configs/sun3x_defconfig
View File

@ -567,6 +567,7 @@ CONFIG_KUNIT_ALL_TESTS=m
CONFIG_TEST_DHRY=m
CONFIG_TEST_MIN_HEAP=m
CONFIG_TEST_DIV64=m
CONFIG_TEST_MULDIV64=m
CONFIG_REED_SOLOMON_TEST=m
CONFIG_ATOMIC64_SELFTEST=m
CONFIG_ASYNC_RAID6_TEST=m

4
arch/m68k/include/asm/irq.h
View File

@ -28,10 +28,8 @@
#define NR_IRQS 32
#elif defined(CONFIG_APOLLO)
#define NR_IRQS 24
#elif defined(CONFIG_HP300)
#else /* CONFIG_HP300 etc. */
#define NR_IRQS 8
#else
#define NR_IRQS 0
#endif
#if defined(CONFIG_M68020) || defined(CONFIG_M68030) || \

4
arch/m68k/include/asm/mvme147hw.h
View File

@ -93,8 +93,8 @@ struct pcc_regs {
#define M147_SCC_B_ADDR 0xfffe3000
#define M147_SCC_PCLK 5000000
#define MVME147_IRQ_SCSI_PORT (IRQ_USER+0x45)
#define MVME147_IRQ_SCSI_DMA (IRQ_USER+0x46)
#define MVME147_IRQ_SCSI_PORT (IRQ_USER + 5)
#define MVME147_IRQ_SCSI_DMA (IRQ_USER + 6)
/* SCC interrupts, for MVME147 */

12
arch/m68k/kernel/Makefile
View File

@ -5,16 +5,8 @@
extra-y += vmlinux.lds
obj-$(CONFIG_AMIGA) := head.o
obj-$(CONFIG_ATARI) := head.o
obj-$(CONFIG_MAC) := head.o
obj-$(CONFIG_APOLLO) := head.o
obj-$(CONFIG_VME) := head.o
obj-$(CONFIG_HP300) := head.o
obj-$(CONFIG_Q40) := head.o
obj-$(CONFIG_SUN3X) := head.o
obj-$(CONFIG_VIRT) := head.o
obj-$(CONFIG_SUN3) := sun3-head.o
obj-$(CONFIG_MMU_MOTOROLA) := head.o
obj-$(CONFIG_SUN3) := sun3-head.o
obj-y += entry.o irq.o module.o process.o ptrace.o
obj-y += setup.o signal.o sys_m68k.o syscalltable.o time.o traps.o

5
arch/m68k/kernel/early_printk.c
View File

@ -13,6 +13,7 @@
#include <asm/setup.h>
#include "../mvme147/mvme147.h"
#include "../mvme16x/mvme16x.h"
asmlinkage void __init debug_cons_nputs(const char *s, unsigned n);
@ -22,7 +23,9 @@ static void __ref debug_cons_write(struct console *c,
{
#if !(defined(CONFIG_SUN3) || defined(CONFIG_M68000) || \
defined(CONFIG_COLDFIRE))
if (MACH_IS_MVME16x)
if (MACH_IS_MVME147)
mvme147_scc_write(c, s, n);
else if (MACH_IS_MVME16x)
mvme16x_cons_write(c, s, n);
else
debug_cons_nputs(s, n);

6
arch/m68k/kernel/setup_mm.c
View File

@ -249,7 +249,11 @@ void __init setup_arch(char **cmdline_p)
process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
*cmdline_p = m68k_command_line;
memcpy(boot_command_line, *cmdline_p, CL_SIZE);
/*
* Initialise the static keys early as they may be enabled by the
* cpufeature code and early parameters.
*/
jump_label_init();
parse_early_param();
switch (m68k_machtype) {

4
arch/m68k/kernel/time.c
View File

@ -62,7 +62,7 @@ void timer_heartbeat(void)
}
#endif /* CONFIG_HEARTBEAT */
#ifdef CONFIG_M68KCLASSIC
#if defined(CONFIG_M68KCLASSIC) || defined(CONFIG_SUN3)
/* machine dependent timer functions */
int (*mach_hwclk) (int, struct rtc_time*);
EXPORT_SYMBOL(mach_hwclk);
@ -149,7 +149,7 @@ static int __init rtc_init(void)
module_init(rtc_init);
#endif /* CONFIG_RTC_DRV_GENERIC */
#endif /* CONFIG M68KCLASSIC */
#endif /* CONFIG_M68KCLASSIC || SUN3 */
void __init time_init(void)
{

16
arch/m68k/kernel/traps.c
View File

@ -383,7 +383,7 @@ static inline void bus_error030 (struct frame *fp)
fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
if (ssw & DF)
pr_debug("Data %s fault at %#010lx in %s (pc=%#lx)\n",
ssw & RW ? "read" : "write",
str_read_write(ssw & RW),
fp->un.fmtb.daddr,
space_names[ssw & DFC], fp->ptregs.pc);
@ -419,7 +419,7 @@ static inline void bus_error030 (struct frame *fp)
}
pr_err("Data %s fault at %#010lx in %s (pc=%#lx)\n",
ssw & RW ? "read" : "write",
str_read_write(ssw & RW),
fp->un.fmtb.daddr,
space_names[ssw & DFC], fp->ptregs.pc);
}
@ -455,7 +455,7 @@ static inline void bus_error030 (struct frame *fp)
pr_debug("*** unexpected busfault type=%#04x\n",
buserr_type);
pr_debug("invalid %s access at %#lx from pc %#lx\n",
!(ssw & RW) ? "write" : "read", addr,
str_read_write(ssw & RW), addr,
fp->ptregs.pc);
die_if_kernel ("Oops", &fp->ptregs, buserr_type);
force_sig (SIGBUS);
@ -514,7 +514,7 @@ static inline void bus_error030 (struct frame *fp)
fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
if (ssw & DF)
pr_debug("Data %s fault at %#010lx in %s (pc=%#lx)\n",
ssw & RW ? "read" : "write",
str_read_write(ssw & RW),
fp->un.fmtb.daddr,
space_names[ssw & DFC], fp->ptregs.pc);
@ -548,7 +548,7 @@ static inline void bus_error030 (struct frame *fp)
/* We might have an exception table for this PC */
if (ssw & 4 && !search_exception_tables(fp->ptregs.pc)) {
pr_err("Data %s fault at %#010lx in %s (pc=%#lx)\n",
ssw & RW ? "read" : "write",
str_read_write(ssw & RW),
fp->un.fmtb.daddr,
space_names[ssw & DFC], fp->ptregs.pc);
goto buserr;
@ -564,7 +564,7 @@ static inline void bus_error030 (struct frame *fp)
mmusr);
} else if (mmusr & (MMU_B|MMU_L|MMU_S)) {
pr_err("invalid %s access at %#lx from pc %#lx\n",
!(ssw & RW) ? "write" : "read", addr,
str_read_write(ssw & RW), addr,
fp->ptregs.pc);
die_if_kernel("Oops",&fp->ptregs,mmusr);
force_sig(SIGSEGV);
@ -575,7 +575,7 @@ static inline void bus_error030 (struct frame *fp)
#endif
pr_err("weird %s access at %#lx from pc %#lx (ssw is %#x)\n",
!(ssw & RW) ? "write" : "read", addr,
str_read_write(ssw & RW), addr,
fp->ptregs.pc, ssw);
asm volatile ("ptestr #1,%1@,#0\n\t"
"pmove %%psr,%0"
@ -991,7 +991,7 @@ static void bad_super_trap(struct frame *fp)
fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
if (ssw & DF)
pr_err("Data %s fault at %#010lx in %s (pc=%#lx)\n",
ssw & RW ? "read" : "write",
str_read_write(ssw & RW),
fp->un.fmtb.daddr, space_names[ssw & DFC],
fp->ptregs.pc);
}

34
arch/m68k/mvme147/config.c
View File

@ -32,9 +32,10 @@
#include <asm/mvme147hw.h>
#include <asm/config.h>
#include "mvme147.h"
static void mvme147_get_model(char *model);
extern void mvme147_sched_init(void);
static void __init mvme147_sched_init(void);
extern int mvme147_hwclk (int, struct rtc_time *);
extern void mvme147_reset (void);
@ -123,7 +124,7 @@ static irqreturn_t mvme147_timer_int (int irq, void *dev_id)
}
void mvme147_sched_init (void)
static void __init mvme147_sched_init(void)
{
if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, IRQF_TIMER,
"timer 1", NULL))
@ -185,3 +186,32 @@ int mvme147_hwclk(int op, struct rtc_time *t)
}
return 0;
}
static void scc_delay(void)
{
__asm__ __volatile__ ("nop; nop;");
}
static void scc_write(char ch)
{
do {
scc_delay();
} while (!(in_8(M147_SCC_A_ADDR) & BIT(2)));
scc_delay();
out_8(M147_SCC_A_ADDR, 8);
scc_delay();
out_8(M147_SCC_A_ADDR, ch);
}
void mvme147_scc_write(struct console *co, const char *str, unsigned int count)
{
unsigned long flags;
local_irq_save(flags);
while (count--) {
if (*str == '\n')
scc_write('\r');
scc_write(*str++);
}
local_irq_restore(flags);
}

6
arch/m68k/mvme147/mvme147.h Normal file
View File

@ -0,0 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
struct console;
/* config.c */
void mvme147_scc_write(struct console *co, const char *str, unsigned int count);