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deep sleep on Intel SSE3+ CPUs

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git-svn-id: svn://kolibrios.org@5033 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
CleverMouse 2014-08-15 15:46:44 +00:00
parent cd8fe59acc
commit 05b46beb07
1 changed files with 149 additions and 4 deletions
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153
kernel/trunk/kernel.asm
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@ -309,6 +309,25 @@ use16
org $-0x10000
include "boot/shutdown.inc" ; shutdown or restart
org $+0x10000
ap_init16:
cli
lgdt [cs:gdts_ap-ap_init16]
mov eax, [cs:cr3_ap-ap_init16]
mov cr3, eax
mov eax, [cs:cr4_ap-ap_init16]
mov cr4, eax
mov eax, CR0_PE+CR0_PG+CR0_WP
mov cr0, eax
jmp pword os_code:ap_init_high
align 16
gdts_ap:
dw gdte-gdts-1
dd gdts
dw 0
cr3_ap dd ?
cr4_ap dd ?
ap_init16_size = $ - ap_init16
use32
__DEBUG__ fix 1
@ -678,6 +697,62 @@ no_mode_0x12:
mov dword [current_slot], SLOT_BASE + 256*2
mov dword [TASK_BASE], CURRENT_TASK + 32*2
; Move other CPUs to deep sleep, if it is useful
uglobal
use_mwait_for_idle db 0
endg
cmp [cpu_vendor+8], 'ntel'
jnz .no_wake_cpus
bt [cpu_caps+4], CAPS_MONITOR-32
jnc .no_wake_cpus
dbgstr 'using mwait for idle loop'
inc [use_mwait_for_idle]
mov ebx, [cpu_count]
cmp ebx, 1
jbe .no_wake_cpus
call create_trampoline_pgmap
mov [cr3_ap+OS_BASE], eax
mov eax, cr4
mov [cr4_ap+OS_BASE], eax
mov esi, OS_BASE + ap_init16
mov edi, OS_BASE + 8000h
mov ecx, (ap_init16_size + 3) / 4
rep movsd
stdcall map_io_mem, [acpi_lapic_base], 0x1000, PG_SW+PG_NOCACHE
mov [LAPIC_BASE], eax
lea edi, [eax+300h]
mov esi, smpt+4
dec ebx
.wake_cpus_loop:
lodsd
shl eax, 24
mov [edi+10h], eax
; assert INIT IPI
mov dword [edi], 0C500h
@@:
test dword [edi], 1000h
jnz @b
; deassert INIT IPI
mov dword [edi], 8500h
@@:
test dword [edi], 1000h
jnz @b
; send STARTUP IPI
mov dword [edi], 600h + (8000h shr 12)
@@:
test dword [edi], 1000h
jnz @b
dec ebx
jnz .wake_cpus_loop
mov eax, [cpu_count]
dec eax
@@:
cmp [ap_initialized], eax
jnz @b
mov eax, [cr3_ap+OS_BASE]
call free_page
.no_wake_cpus:
; REDIRECT ALL IRQ'S TO INT'S 0x20-0x2f
mov esi, boot_initirq
@ -1030,6 +1105,27 @@ end if
; Fly :)
uglobal
align 4
ap_initialized dd 0
endg
ap_init_high:
mov ax, os_stack
mov bx, app_data
mov cx, app_tls
mov ss, ax
mov ds, bx
mov es, bx
mov fs, cx
mov gs, bx
xor esp, esp
mov eax, sys_pgdir-OS_BASE
mov cr3, eax
lock inc [ap_initialized]
jmp idle_loop
include 'unpacker.inc'
align 4
@ -1164,13 +1260,35 @@ align 4
osloop_nonperiodic_work dd ?
endg
align 4
uglobal
align 64
idle_addr rb 64
endg
idle_thread:
sti
idle_loop:
hlt
jmp idle_loop
; The following code can be executed by all CPUs in the system.
; All other parts of the kernel do not expect multi-CPU.
; Also, APs don't even have a stack here.
; Beware. Don't do anything here. Anything at all.
idle_loop:
cmp [use_mwait_for_idle], 0
jnz idle_loop_mwait
idle_loop_hlt:
hlt
jmp idle_loop_hlt
idle_loop_mwait:
mov eax, idle_addr
xor ecx, ecx
xor edx, edx
monitor
xor ecx, ecx
mov eax, 20h ; or 10h
mwait
jmp idle_loop_mwait
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@ -5429,6 +5547,33 @@ system_shutdown: ; shut down the system
call stop_all_services
yes_shutdown_param:
; Shutdown other CPUs, if initialized
cmp [ap_initialized], 0
jz .no_shutdown_cpus
mov edi, [LAPIC_BASE]
add edi, 300h
mov esi, smpt+4
mov ebx, [cpu_count]
dec ebx
.shutdown_cpus_loop:
lodsd
shl eax, 24
mov [edi+10h], eax
; assert INIT IPI
mov dword [edi], 0C500h
@@:
test dword [edi], 1000h
jnz @b
; deassert INIT IPI
mov dword [edi], 8500h
@@:
test dword [edi], 1000h
jnz @b
; don't send STARTUP IPI: let other CPUs be in wait-for-startup state
dec ebx
jnz .shutdown_cpus_loop
.no_shutdown_cpus:
cli
if ~ defined extended_primary_loader