efi/serial: re-init serial after efi detatchment

* This prevents haiku from "messing" with the gUART until
EFI boot services are exiting.
* The previous design meant that our loader started fiddling
with the gUART while EFI BIOS services were still being
used. On the SiFive, this broke serial output.
* Now, we guard on serial_init if EFI is unavailable, and
only fallback to direct UART usage when EFI is no longer
available.
* tldr; we're more closely managing serial across architectures
* serial_init use EFI and init it
* kernel_serial_handoff, stop using EFI
* serial_init, oh no EFI. Use gUART and Init it
* one gap is likely if no serial is available in EFI, but I
haven't seen that yet.

Change-Id: I644b51e4912272110435d288a95517d43a76740d
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6200
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>

platform/efi/riscv64: Drop extra SetSatp before jumping into kernel

* arch_enter_kernel does this anyway
* Called here, it causes a hang

Change-Id: I39d1a89d217fd0fbd55e7d91317b9d13b9758960
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6181
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Reviewed-by: David Karoly <karolyd577@gmail.com>
Tested-by: Automation <automation@haiku-os.org>
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>
Reviewed-by: X512 <danger_mail@list.ru>

efi/serial: Refactor EFI bios serial services

* Convert x86 direct port I/O to our standard gUART.
* sSerial is plainly EFI Serial or EFI Stdout
* gUART is plainly hardware serial now

Change-Id: I5730fbc0ce3427851e4e2d1d0aa8c55f7765e444
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5982
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

boot/efi/riscv64: use generic mmu functions

Change-Id: I671f41b9c163c522ffa7ffcb2509f279c4c9496a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5701
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>

system/boot/efi: riscv64, reallocate kernelArgs in bootloader

Change-Id: Id57de8c460f123fc937e82082bf039d604401083

boot/efi/x86: implement SMP detection and bootup

* move common SMP initialization code to x86/arch_smp.cpp

* factor out arch-specific SMP initialization to
arch_smp_32.cpp resp arch_smp_64.cpp

* implement smp_trampoline for x86 32-bit EFI loader

* rename SMP trampoline for x86_64 to long_smp_trampoline

* add new argument virtKernelArgs to arch_smp_boot_other_cpus
as the kernel args are not identity mapped on 32-bit architectures

Change-Id: I30d0bb1fa9bfb08f6784a2af34eb83d6b64afa57
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4869
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>

boot/efi: introduce arch_convert_kernel_args

Change-Id: Iabb321564d6733c6cf481ec2548fa287e308ae89
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4796
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

kernel/arch/platform: implement for riscv64

Change-Id: Id1839ef39d927e6a2017c8b8ac3482d9eeb00fa1
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4059
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>

haiku_loader.efi: update for riscv64

* Added MMU page table generation.
* Added optional FDT device detection and passing to kernel.
* Add platform address translation stubs to bios_ia32
to drop EFI ifdefs

Change-Id: I89257c93c84404fd988f621b29f927ed0df3c3b1
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4304
Reviewed-by: Jessica Hamilton <jessica.l.hamilton@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

riscv64: Finish initial work on an EFI loader

Change-Id: Ia386d9155dda37ff6608a33dee349bf5332890c3
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3162
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Reviewed-by: François Revol <revol@free.fr>