Fix crash(8) build

Rework Arm (32bit and 64bit) AP startup so that cpu_hatch doesn't sleep.

The AP initialisation code in cpu_init_secondary_processor will read and
initialise the required system registers and state for the BP to attach
and report.

Rework the interrupt handler code for this new sequence. Thankfully,
this removes a bunch of code for bcm2836mp.

The VFP detection handler on <= armv7 relies on the global undefined
handler being in place until the BP attaches vfp. That is, after the
APs have been spun up.

gicv3_its.c has a serialisation issue which is protected against in
the gicv3_its_cpu_init, which is called from cpu_hatch, with a spin
lock. The serialisation issue needs addressing more completely.

Tested on RPI3, Apple M1, QEMU, and lx2k

Fixes PR port-arm/56264:
diagnostic assertion "l->l_stat == LSONPROC" failed on RPI3

Make the ddb for pmap / pte information pmap agnostic

branches: 1.13.4;
- fixed a problem where hardware {break,watch}points other than #0 could not be cleared
- hardware {break,watch}point addresses are now strictly checked

Add support hardware breakpoint and watchpoint again.

Limited support for hardware watchpoint has been available for some time, but it
has not been working properly. In addition, it stopped working at the time of
the PTRACE support commit on 2018-12-13. This has been fixed to work correctly,
and also fixed to be practical by sharing hardware watchpoints and breakpoints
between CPUs on MULTIPROCESSOR.

Also fixed a bug that causes a malfunction when switching CPUs with
"machine cpu N" when entering ddb mode from other than cpu_Debugger().

I have confirmed that the CPU can be switched by "machine cpu N" and return from
ddb properly in each case where ddb is called triggered by ddb break/watchpoint,
hardware break/watchpoint, and cpu_Debugger().

branches: 1.11.2;
sprinkle LE32TOH to fetch instructions on aarch64eb

Determination of A64,A32,T32 for disasm is now done in strrdisasm() instead of the caller.
correctly disassemble by processor state if defined DEBUG_DUMP_ON_USERFAULT or DEBUG_DDB_ON_USERFAULT.

fix to do backtrace properly for running LWPs and cpu_lwp_fork().
when dump of pcb_tf, only the switchframe part is now displayed instead of the whole trapframe.

add initial support of COMPAT_NETBSD32 on AArch64.
arm ELF32 EABI binaries could be execute in AArch32 state on AArch64. A32 THUMB mode is not supported yet.

make kernel-groveling crash(8) work on aarch64

use panic() instead of some printf to show fault status.
useful for ddb "show panic" command.

branches: 1.5.2;
Oops, my previous commit is totally wrong. recast mask/pattern list.
pointed out by David Binderman in PR/53224, thanks.

remove suspicious compare, and cleanup complex conditionals.
pointed out PR/53159 by dcb314, thanks.

Add initial support for ARMv8 (AARCH64) (by nisimura@ and ryo@)

- sys/arch/evbarm64 is gone and integrated into sys/arch/evbarm. (by skrll@)
- add support fdt. evbarm/conf/GENERIC64 fdt (bcm2837,sunxi,tegra) based generic 64bit kernel config. (by skrll@, jmcneill@)

branches: 1.2.16;
PR port-arm/50641: src/sys/arch/aarch64/include/db_machdep.h:67: possible bad if test ?

Fix the bl instruction test.

branches: 1.1.4; 1.1.6;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

Make the ddb for pmap / pte information pmap agnostic

- fixed a problem where hardware {break,watch}points other than #0 could not be cleared
- hardware {break,watch}point addresses are now strictly checked

Add support hardware breakpoint and watchpoint again.

Limited support for hardware watchpoint has been available for some time, but it
has not been working properly. In addition, it stopped working at the time of
the PTRACE support commit on 2018-12-13. This has been fixed to work correctly,
and also fixed to be practical by sharing hardware watchpoints and breakpoints
between CPUs on MULTIPROCESSOR.

Also fixed a bug that causes a malfunction when switching CPUs with
"machine cpu N" when entering ddb mode from other than cpu_Debugger().

I have confirmed that the CPU can be switched by "machine cpu N" and return from
ddb properly in each case where ddb is called triggered by ddb break/watchpoint,
hardware break/watchpoint, and cpu_Debugger().

branches: 1.11.2;
sprinkle LE32TOH to fetch instructions on aarch64eb

Determination of A64,A32,T32 for disasm is now done in strrdisasm() instead of the caller.
correctly disassemble by processor state if defined DEBUG_DUMP_ON_USERFAULT or DEBUG_DDB_ON_USERFAULT.

fix to do backtrace properly for running LWPs and cpu_lwp_fork().
when dump of pcb_tf, only the switchframe part is now displayed instead of the whole trapframe.

add initial support of COMPAT_NETBSD32 on AArch64.
arm ELF32 EABI binaries could be execute in AArch32 state on AArch64. A32 THUMB mode is not supported yet.

make kernel-groveling crash(8) work on aarch64

use panic() instead of some printf to show fault status.
useful for ddb "show panic" command.

branches: 1.5.2;
Oops, my previous commit is totally wrong. recast mask/pattern list.
pointed out by David Binderman in PR/53224, thanks.

remove suspicious compare, and cleanup complex conditionals.
pointed out PR/53159 by dcb314, thanks.

Add initial support for ARMv8 (AARCH64) (by nisimura@ and ryo@)

- sys/arch/evbarm64 is gone and integrated into sys/arch/evbarm. (by skrll@)
- add support fdt. evbarm/conf/GENERIC64 fdt (bcm2837,sunxi,tegra) based generic 64bit kernel config. (by skrll@, jmcneill@)

branches: 1.2.16;
PR port-arm/50641: src/sys/arch/aarch64/include/db_machdep.h:67: possible bad if test ?

Fix the bl instruction test.

branches: 1.1.4; 1.1.6;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

- fixed a problem where hardware {break,watch}points other than #0 could not be cleared
- hardware {break,watch}point addresses are now strictly checked

Add support hardware breakpoint and watchpoint again.

Limited support for hardware watchpoint has been available for some time, but it
has not been working properly. In addition, it stopped working at the time of
the PTRACE support commit on 2018-12-13. This has been fixed to work correctly,
and also fixed to be practical by sharing hardware watchpoints and breakpoints
between CPUs on MULTIPROCESSOR.

Also fixed a bug that causes a malfunction when switching CPUs with
"machine cpu N" when entering ddb mode from other than cpu_Debugger().

I have confirmed that the CPU can be switched by "machine cpu N" and return from
ddb properly in each case where ddb is called triggered by ddb break/watchpoint,
hardware break/watchpoint, and cpu_Debugger().

sprinkle LE32TOH to fetch instructions on aarch64eb

Determination of A64,A32,T32 for disasm is now done in strrdisasm() instead of the caller.
correctly disassemble by processor state if defined DEBUG_DUMP_ON_USERFAULT or DEBUG_DDB_ON_USERFAULT.

fix to do backtrace properly for running LWPs and cpu_lwp_fork().
when dump of pcb_tf, only the switchframe part is now displayed instead of the whole trapframe.

add initial support of COMPAT_NETBSD32 on AArch64.
arm ELF32 EABI binaries could be execute in AArch32 state on AArch64. A32 THUMB mode is not supported yet.

make kernel-groveling crash(8) work on aarch64

use panic() instead of some printf to show fault status.
useful for ddb "show panic" command.

branches: 1.5.2;
Oops, my previous commit is totally wrong. recast mask/pattern list.
pointed out by David Binderman in PR/53224, thanks.

remove suspicious compare, and cleanup complex conditionals.
pointed out PR/53159 by dcb314, thanks.

Add initial support for ARMv8 (AARCH64) (by nisimura@ and ryo@)

- sys/arch/evbarm64 is gone and integrated into sys/arch/evbarm. (by skrll@)
- add support fdt. evbarm/conf/GENERIC64 fdt (bcm2837,sunxi,tegra) based generic 64bit kernel config. (by skrll@, jmcneill@)

branches: 1.2.16;
PR port-arm/50641: src/sys/arch/aarch64/include/db_machdep.h:67: possible bad if test ?

Fix the bl instruction test.

branches: 1.1.4; 1.1.6;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

Add support hardware breakpoint and watchpoint again.

Limited support for hardware watchpoint has been available for some time, but it
has not been working properly. In addition, it stopped working at the time of
the PTRACE support commit on 2018-12-13. This has been fixed to work correctly,
and also fixed to be practical by sharing hardware watchpoints and breakpoints
between CPUs on MULTIPROCESSOR.

Also fixed a bug that causes a malfunction when switching CPUs with
"machine cpu N" when entering ddb mode from other than cpu_Debugger().

I have confirmed that the CPU can be switched by "machine cpu N" and return from
ddb properly in each case where ddb is called triggered by ddb break/watchpoint,
hardware break/watchpoint, and cpu_Debugger().

sprinkle LE32TOH to fetch instructions on aarch64eb

Determination of A64,A32,T32 for disasm is now done in strrdisasm() instead of the caller.
correctly disassemble by processor state if defined DEBUG_DUMP_ON_USERFAULT or DEBUG_DDB_ON_USERFAULT.

fix to do backtrace properly for running LWPs and cpu_lwp_fork().
when dump of pcb_tf, only the switchframe part is now displayed instead of the whole trapframe.

add initial support of COMPAT_NETBSD32 on AArch64.
arm ELF32 EABI binaries could be execute in AArch32 state on AArch64. A32 THUMB mode is not supported yet.

make kernel-groveling crash(8) work on aarch64

use panic() instead of some printf to show fault status.
useful for ddb "show panic" command.

branches: 1.5.2;
Oops, my previous commit is totally wrong. recast mask/pattern list.
pointed out by David Binderman in PR/53224, thanks.

remove suspicious compare, and cleanup complex conditionals.
pointed out PR/53159 by dcb314, thanks.

Add initial support for ARMv8 (AARCH64) (by nisimura@ and ryo@)

- sys/arch/evbarm64 is gone and integrated into sys/arch/evbarm. (by skrll@)
- add support fdt. evbarm/conf/GENERIC64 fdt (bcm2837,sunxi,tegra) based generic 64bit kernel config. (by skrll@, jmcneill@)

branches: 1.2.16;
PR port-arm/50641: src/sys/arch/aarch64/include/db_machdep.h:67: possible bad if test ?

Fix the bl instruction test.

branches: 1.1.4; 1.1.6;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

sprinkle LE32TOH to fetch instructions on aarch64eb

Determination of A64,A32,T32 for disasm is now done in strrdisasm() instead of the caller.
correctly disassemble by processor state if defined DEBUG_DUMP_ON_USERFAULT or DEBUG_DDB_ON_USERFAULT.

fix to do backtrace properly for running LWPs and cpu_lwp_fork().
when dump of pcb_tf, only the switchframe part is now displayed instead of the whole trapframe.

add initial support of COMPAT_NETBSD32 on AArch64.
arm ELF32 EABI binaries could be execute in AArch32 state on AArch64. A32 THUMB mode is not supported yet.

make kernel-groveling crash(8) work on aarch64

use panic() instead of some printf to show fault status.
useful for ddb "show panic" command.

branches: 1.5.2;
Oops, my previous commit is totally wrong. recast mask/pattern list.
pointed out by David Binderman in PR/53224, thanks.

remove suspicious compare, and cleanup complex conditionals.
pointed out PR/53159 by dcb314, thanks.

Add initial support for ARMv8 (AARCH64) (by nisimura@ and ryo@)

- sys/arch/evbarm64 is gone and integrated into sys/arch/evbarm. (by skrll@)
- add support fdt. evbarm/conf/GENERIC64 fdt (bcm2837,sunxi,tegra) based generic 64bit kernel config. (by skrll@, jmcneill@)

branches: 1.2.16;
PR port-arm/50641: src/sys/arch/aarch64/include/db_machdep.h:67: possible bad if test ?

Fix the bl instruction test.

branches: 1.1.4; 1.1.6;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

Determination of A64,A32,T32 for disasm is now done in strrdisasm() instead of the caller.
correctly disassemble by processor state if defined DEBUG_DUMP_ON_USERFAULT or DEBUG_DDB_ON_USERFAULT.

fix to do backtrace properly for running LWPs and cpu_lwp_fork().
when dump of pcb_tf, only the switchframe part is now displayed instead of the whole trapframe.

add initial support of COMPAT_NETBSD32 on AArch64.
arm ELF32 EABI binaries could be execute in AArch32 state on AArch64. A32 THUMB mode is not supported yet.

make kernel-groveling crash(8) work on aarch64

use panic() instead of some printf to show fault status.
useful for ddb "show panic" command.

branches: 1.5.2;
Oops, my previous commit is totally wrong. recast mask/pattern list.
pointed out by David Binderman in PR/53224, thanks.

remove suspicious compare, and cleanup complex conditionals.
pointed out PR/53159 by dcb314, thanks.

Add initial support for ARMv8 (AARCH64) (by nisimura@ and ryo@)

- sys/arch/evbarm64 is gone and integrated into sys/arch/evbarm. (by skrll@)
- add support fdt. evbarm/conf/GENERIC64 fdt (bcm2837,sunxi,tegra) based generic 64bit kernel config. (by skrll@, jmcneill@)

branches: 1.2.16;
PR port-arm/50641: src/sys/arch/aarch64/include/db_machdep.h:67: possible bad if test ?

Fix the bl instruction test.

branches: 1.1.4; 1.1.6;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

fix to do backtrace properly for running LWPs and cpu_lwp_fork().
when dump of pcb_tf, only the switchframe part is now displayed instead of the whole trapframe.

add initial support of COMPAT_NETBSD32 on AArch64.
arm ELF32 EABI binaries could be execute in AArch32 state on AArch64. A32 THUMB mode is not supported yet.

make kernel-groveling crash(8) work on aarch64

use panic() instead of some printf to show fault status.
useful for ddb "show panic" command.

branches: 1.5.2;
Oops, my previous commit is totally wrong. recast mask/pattern list.
pointed out by David Binderman in PR/53224, thanks.

remove suspicious compare, and cleanup complex conditionals.
pointed out PR/53159 by dcb314, thanks.

Add initial support for ARMv8 (AARCH64) (by nisimura@ and ryo@)

- sys/arch/evbarm64 is gone and integrated into sys/arch/evbarm. (by skrll@)
- add support fdt. evbarm/conf/GENERIC64 fdt (bcm2837,sunxi,tegra) based generic 64bit kernel config. (by skrll@, jmcneill@)

branches: 1.2.16;
PR port-arm/50641: src/sys/arch/aarch64/include/db_machdep.h:67: possible bad if test ?

Fix the bl instruction test.

branches: 1.1.4; 1.1.6;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

add initial support of COMPAT_NETBSD32 on AArch64.
arm ELF32 EABI binaries could be execute in AArch32 state on AArch64. A32 THUMB mode is not supported yet.

make kernel-groveling crash(8) work on aarch64

use panic() instead of some printf to show fault status.
useful for ddb "show panic" command.

Oops, my previous commit is totally wrong. recast mask/pattern list.
pointed out by David Binderman in PR/53224, thanks.

remove suspicious compare, and cleanup complex conditionals.
pointed out PR/53159 by dcb314, thanks.

Add initial support for ARMv8 (AARCH64) (by nisimura@ and ryo@)

- sys/arch/evbarm64 is gone and integrated into sys/arch/evbarm. (by skrll@)
- add support fdt. evbarm/conf/GENERIC64 fdt (bcm2837,sunxi,tegra) based generic 64bit kernel config. (by skrll@, jmcneill@)

branches: 1.2.16;
PR port-arm/50641: src/sys/arch/aarch64/include/db_machdep.h:67: possible bad if test ?

Fix the bl instruction test.

branches: 1.1.4; 1.1.6;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

PR port-arm/50641: src/sys/arch/aarch64/include/db_machdep.h:67: possible bad if test ?

Fix the bl instruction test.

branches: 1.1.4; 1.1.6;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.