forked from KolibriOS/kolibrios
Ivan Baravy
a9121a0da9
Also, replace some hardcoded constants with macros. git-svn-id: svn://kolibrios.org@8111 a494cfbc-eb01-0410-851d-a64ba20cac60
75 lines
2.0 KiB
PHP
75 lines
2.0 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; ;;
|
|
;; Copyright (C) KolibriOS team 2004-2020. All rights reserved. ;;
|
|
;; Distributed under terms of the GNU General Public License ;;
|
|
;; ;;
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
$Revision$
|
|
|
|
HPET_ID = 0x0000
|
|
HPET_PERIOD = 0x0004
|
|
HPET_CFG_ENABLE = 0x0001
|
|
HPET_CFG = 0x0010
|
|
HPET_COUNTER = 0x00f0
|
|
HPET_T0_CFG = 0x0100
|
|
|
|
HPET_TN_LEVEL = 0x0002
|
|
HPET_TN_ENABLE = 0x0004
|
|
HPET_TN_FSB = 0x4000
|
|
|
|
uglobal
|
|
hpet_base rd 1
|
|
hpet_period rd 1
|
|
hpet_timers rd 1
|
|
hpet_tsc_start rd 2
|
|
endg
|
|
|
|
align 4
|
|
init_hpet:
|
|
mov ebx, [hpet_base]
|
|
test ebx, ebx
|
|
jz .done
|
|
|
|
mov eax, [ebx]
|
|
and ah, 0x1F
|
|
inc ah
|
|
movzx eax, ah
|
|
mov [hpet_timers], eax
|
|
mov ecx, eax
|
|
|
|
mov eax, [ebx+HPET_PERIOD]
|
|
xor edx, edx
|
|
shld edx, eax, 10
|
|
shl eax, 10
|
|
mov esi, 1000000
|
|
div esi
|
|
mov [hpet_period], eax
|
|
|
|
mov esi, [ebx+HPET_CFG]
|
|
and esi, not HPET_CFG_ENABLE
|
|
mov [ebx+HPET_CFG], esi ;stop main counter
|
|
|
|
lea edx, [ebx+HPET_T0_CFG]
|
|
@@:
|
|
jcxz @F
|
|
mov eax, [edx]
|
|
and eax, not (HPET_TN_ENABLE+HPET_TN_LEVEL+HPET_TN_FSB)
|
|
mov [edx], eax
|
|
add edx, 0x20
|
|
dec ecx
|
|
jmp @B
|
|
@@:
|
|
mov [ebx+HPET_COUNTER], ecx ;reset main counter
|
|
mov [ebx+HPET_COUNTER+4], ecx
|
|
|
|
or esi, HPET_CFG_ENABLE
|
|
mov [ebx+HPET_CFG], esi ;and start again
|
|
|
|
.done:
|
|
rdtsc
|
|
mov [hpet_tsc_start], eax
|
|
mov [hpet_tsc_start+4], edx
|
|
|
|
ret
|