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parseconfig.inc

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Revision 33cef16bfdef4576be2b538506b4f8a61bf9c0a2, 9.9 KB (checked in by H. Peter Anvin <hpa@…>, 17 months ago)

core: remove HAS_LOCALBOOT

HAS_LOCALBOOT is set unconditionally in config.inc.

Signed-off-by: Sebastian Herbszt <herbszt@…>
Signed-off-by: H. Peter Anvin <hpa@…>

Property mode set to 100644

Line
1	;; -----------------------------------------------------------------------
2	;;
3	;; Copyright 1994-2009 H. Peter Anvin - All Rights Reserved
4	;; Copyright 2009 Intel Corporation; author: H. Peter Anvin
5	;;
6	;; This program is free software; you can redistribute it and/or modify
7	;; it under the terms of the GNU General Public License as published by
8	;; the Free Software Foundation, Inc., 53 Temple Place Ste 330,
9	;; Boston MA 02111-1307, USA; either version 2 of the License, or
10	;; (at your option) any later version; incorporated herein by reference.
11	;;
12	;; -----------------------------------------------------------------------
13
14	;;
15	;; parseconfig.inc
16	;;
17	;; Configuration file operations
18	;;
19
20	section .text16
21	;
22	; "default" or "ui" command, with level (1 = default, 2 = ui)
23	;
24	pc_default: cmp ax,[DefaultLevel]
25	jb skipline ; == call skipline + ret
26	mov [DefaultLevel],ax
27	mov di,default_cmd
28	call getline
29	mov byte [di-1],0 ; null-terminate
30	ret
31
32	;
33	; "ontimeout" command
34	;
35	pc_ontimeout: mov di,Ontimeout
36	call getline
37	sub di,Ontimeout+1 ; Don't need final space
38	mov [OntimeoutLen],di
39	ret
40
41	;
42	; "onerror" command
43	;
44	pc_onerror: mov di,Onerror
45	call getline
46	sub di,Onerror
47	mov [OnerrorLen],di
48	ret
49
50	;
51	; "append" command
52	;
53	pc_append: cmp byte [VKernel],0
54	ja .vk
55	mov di,AppendBuf
56	call getline
57	sub di,AppendBuf
58	.app1: mov [AppendLen],di
59	ret
60	.vk: mov di,VKernelBuf+vk_append ; "append" command (vkernel)
61	call getline
62	sub di,VKernelBuf+vk_append
63	cmp di,byte 2
64	jne .app2
65	cmp byte [VKernelBuf+vk_append],'-'
66	jne .app2
67	xor di,di ; If "append -" -> null string
68	.app2: mov [VKernelBuf+vk_appendlen],di
69	ret
70
71	;
72	; "ipappend" command (PXELINUX only)
73	;
74	%if IS_PXELINUX
75	pc_ipappend: call getint
76	jc .err
77	cmp byte [VKernel],0
78	jne .vk
79	mov [IPAppend],bl
80	.err: ret
81	.vk: mov [VKernelBuf+vk_ipappend],bl
82	ret
83	%endif
84
85	;
86	; "localboot" command
87	;
88	pc_localboot: call getint
89	cmp byte [VKernel],0 ; ("label" section only)
90	je .err
91	mov [VKernelBuf+vk_rname],bx
92	mov byte [VKernelBuf+vk_type],VK_LOCALBOOT
93	.err: ret
94
95	;
96	; "kernel", "config", ... command
97	;
98	pc_kernel: cmp byte [VKernel],0
99	je .err ; ("label" section only)
100	mov [VKernelBuf+vk_type],al
101	call pc_getline
102	mov di,VKernelBuf+vk_rname
103	pm_call pm_mangle_name
104	.err: ret
105
106	;
107	; "timeout", "totaltimeout" command
108	;
109	; N.B. 1/10 s ~ 1.D2162AABh clock ticks
110	;
111	pc_timeout: push ax
112	call getint
113	pop si
114	jc .err
115	mov eax,0D2162AABh
116	mul ebx ; clock ticks per 1/10 s
117	add ebx,edx
118	mov [si],ebx
119	.err: ret
120
121
122	;
123	; "totaltimeout" command
124	;
125	pc_totaltimeout:
126
127	;
128	; Generic integer variable setting commands:
129	; "prompt", "implicit"
130	;
131	pc_setint16:
132	push ax
133	call getint
134	pop si
135	jc .err
136	mov [si],bx
137	.err: ret
138
139	;
140	; Generic file-processing commands:
141	; "font", "kbdmap",
142	;
143	pc_filecmd: push ax ; Function to tailcall
144	call pc_getline
145	mov di,MNameBuf
146	pm_call pm_mangle_name
147	pm_call pm_searchdir
148	jnz .ok
149	pop ax ; Drop the successor function
150	.ok: ret ; Tailcall if OK, error return
151
152	;
153	; Commands that expect the file to be opened on top of the getc stack.
154	; "display", "include"
155	;
156	pc_opencmd: push ax ; Function to tailcall
157	call pc_getline
158	mov di,MNameBuf
159	pm_call pm_mangle_name
160	call core_open
161	jnz .ok
162	pop ax ; Drop the successor function
163	.ok: ret ; Tailcall if OK, error return
164
165	;
166	; "include" command (invoked from pc_opencmd)
167	;
168	pc_include: inc word [IncludeLevel]
169	.err: ret
170
171	;
172	; "serial" command
173	;
174	pc_serial: call getint
175	jc .err
176	push bx ; Serial port #
177	xor eax,eax
178	mov [FlowControl],eax ; Default to no flow control
179	call skipspace
180	jc .nobaud
181	call ungetc
182	call getint
183	jc .nobaud
184	.valid_baud:
185	push ebx
186	call skipspace
187	jc .no_flow
188	call ungetc
189	call getint ; Hardware flow control?
190	jnc .valid_flow
191	.no_flow:
192	xor bx,bx ; Default -> no flow control
193	.valid_flow:
194	and bh,0Fh ; FlowIgnore
195	shl bh,4
196	mov [FlowIgnore],bh
197	mov bh,bl
198	and bx,0F00Bh ; Valid bits
199	mov [FlowControl],bx
200	pop ebx ; Baud rate
201	jmp short .parse_baud
202	.nobaud:
203	mov ebx,DEFAULT_BAUD ; No baud rate given
204	.parse_baud:
205	pop di ; Serial port #
206	cmp ebx,byte 75
207	jb .err ; < 75 baud == bogus
208	mov eax,BAUD_DIVISOR
209	cdq
210	div ebx
211	mov [BaudDivisor],ax
212	push ax ; Baud rate divisor
213	cmp di,3
214	ja .port_is_io ; If port > 3 then port is I/O addr
215	shl di,1
216	mov di,[di+serial_base] ; Get the I/O port from the BIOS
217	.port_is_io:
218	mov [SerialPort],di
219
220	;
221	; Begin code to actually set up the serial port
222	;
223	call sirq_cleanup_nowipe ; Cleanup existing IRQ handler
224
225	lea dx,[di+3] ; DX -> LCR
226	mov al,83h ; Enable DLAB
227	slow_out dx,al
228
229	pop ax ; Divisor
230	mov dx,di ; DX -> LS
231	slow_out dx,al
232
233	inc dx ; DX -> MS
234	mov al,ah
235	slow_out dx,al
236
237	mov al,03h ; Disable DLAB
238	inc dx ; DX -> LCR
239	inc dx
240	slow_out dx,al
241
242	in al,dx ; Read back LCR (detect missing hw)
243	cmp al,03h ; If nothing here we'll read 00 or FF
244	jne .err ; Assume serial port busted
245	dec dx ; DX -> IIR/FCR
246	mov al,01h
247	slow_out dx,al ; Enable FIFOs if present
248	in al,dx
249	cmp al,0C0h ; FIFOs enabled and usable?
250	jae .fifo_ok
251	xor ax,ax ; Disable FIFO if unusable
252	slow_out dx,al
253	.fifo_ok:
254
255	inc dx
256	inc dx ; DX -> MCR
257	mov al,[FlowOutput] ; Assert bits
258	slow_out dx,al
259
260	; Enable interrupts if requested
261	test al,8
262	jz .noirq
263	call sirq_install
264	.noirq:
265
266	; Show some life
267	cmp byte [SerialNotice],0
268	je .notfirst
269	mov byte [SerialNotice],0
270
271	mov si,syslinux_banner
272	call write_serial_str
273	mov si,copyright_str
274	call write_serial_str
275	.notfirst:
276	ret
277
278	.err:
279	mov [SerialPort], word 0
280	ret
281
282	;
283	; Store mangled filename command (F-keys, "initrd")
284	;
285	pc_filename: push ax
286	call pc_getline
287	pop di
288	pm_call pm_mangle_name ; Mangle file name
289	ret
290
291	;
292	; "label" command
293	;
294	pc_label: call commit_vk ; Commit any current vkernel
295	mov byte [InitRD+NULLOFFSET],NULLFILE ; No "initrd" statement
296	mov di,VKernelBuf ; Erase the vkernelbuf for better compression
297	mov cx,(vk_size >> 1)
298	xor ax,ax
299	rep stosw
300	call pc_getline
301	mov di,VKernelBuf+vk_vname
302	mov cx,FILENAME_MAX-1
303	.loop:
304	lodsb
305	cmp al,' '
306	jna .done
307	stosb
308	loop .loop
309	.done:
310	mov byte [VKernel],1 ; We've seen a "label" statement
311	mov si,VKernelBuf+vk_vname ; By default, rname == mangled vname
312	mov di,VKernelBuf+vk_rname
313	pm_call pm_mangle_name
314	mov si,AppendBuf ; Default append==global append
315	mov di,VKernelBuf+vk_append
316	mov cx,[AppendLen]
317	mov [VKernelBuf+vk_appendlen],cx
318	rep movsb
319	%if IS_PXELINUX ; PXELINUX only
320	mov al,[IPAppend] ; Default ipappend==global ipappend
321	mov [VKernelBuf+vk_ipappend],al
322	%endif
323	ret
324
325	;
326	; "say" command
327	;
328	pc_say: call pc_getline ; "say" command
329	call writestr
330	jmp crlf ; tailcall
331
332	;
333	; "text" command; ignore everything until we get an "endtext" line
334	;
335	pc_text: call skipline ; Ignore rest of line
336	.loop:
337	call pc_getline
338	jc .eof
339
340	; Leading spaces are already removed...
341	lodsd
342	and eax,0xdfdfdfdf ; Upper case
343	cmp eax,'ENDT'
344	jne .loop
345	lodsd
346	and eax,0x00dfdfdf ; Upper case and mask
347	cmp eax,'EXT'
348	jne .loop
349	; If we get here we hit ENDTEXT
350	.eof:
351	ret
352
353	;
354	; Comment line
355	;
356	pc_comment: ; Fall into pc_getline
357
358	;
359	; Common subroutine: load line into trackbuf; returns with SI -> trackbuf
360	; CF is set on EOF.
361	;
362	pc_getline: mov di,trackbuf
363	push di
364	call getline
365	mov byte [di],0 ; Null-terminate
366	pop si
367	ret
368
369	;
370	; Main loop for configuration file parsing
371	;
372	parse_config:
373	mov di,VKernelBuf ; Clear VKernelBuf at start
374	xor ax,ax
375	mov cx,vk_size
376	rep stosb
377
378	.again:
379	call getcommand ; Parse one command
380	jnc .again ; If not EOF...
381	call close
382	dec word [IncludeLevel] ; Still parsing?
383	jnz .again
384
385	;
386	; The fall through to commit_vk to commit any final
387	; VKernel being read
388	;
389	;
390	; commit_vk: Store the current VKernelBuf into buffer segment
391	;
392	commit_vk:
393	cmp byte [VKernel],0
394	jz .nolabel ; Nothing to commit...
395
396	mov di,VKernelBuf+vk_append
397	add di,[VKernelBuf+vk_appendlen]
398
399	; If we have an initrd statement, append it to the
400	; append statement
401	cmp byte [InitRD+NULLOFFSET],NULLFILE
402	je .noinitrd
403
404	mov si,str_initrd
405	mov cx,7 ; "initrd="
406	rep movsb
407	mov si,InitRD
408	call strcpy
409	mov byte [es:di-1],' '
410
411	; For better compression, clean up the append field
412	.noinitrd:
413	mov ax,di
414	sub ax,VKernelBuf+vk_append
415	mov [VKernelBuf+vk_appendlen],ax
416	mov cx,max_cmd_len+1
417	sub cx,ax
418	xor ax,ax
419	rep stosb
420
421	; Pack into high memory
422	mov esi,VKernelBuf
423	mov edi,[VKernelEnd]
424	mov ecx,vk_size
425	pm_call rllpack
426	mov [VKernelEnd],edi
427	.nolabel:
428	ret
429	.overflow:
430	mov si,vk_overflow_msg
431	call writestr
432	ret
433
434	section .data16
435	vk_overflow_msg db 'Out of memory parsing config file', CR, LF, 0
436	SerialNotice db 1 ; Only print this once
437
438	section .bss16
439	alignb 4
440	VKernelEnd resd 1 ; Lowest high memory address used
441
442	; This symbol should be used by loaders to indicate
443	; the highest address they are allowed to use.
444	HighMemRsvd equ VKernelEnd
445	; by vkernels
446	section .config
447	alignz 4
448	KbdTimeout dd 0 ; Keyboard timeout (if any)
449	TotalTimeout dd 0 ; Total timeout (if any)
450	AppendLen dw 0 ; Bytes in append= command
451	OntimeoutLen dw 0 ; Bytes in ontimeout command
452	OnerrorLen dw 0 ; Bytes in onerror command
453	CmdLinePtr dw cmd_line_here ; Command line advancing pointer
454	ForcePrompt dw 0 ; Force prompt
455	NoEscape dw 0 ; No escape
456	NoComplete dw 0 ; No label completion on TAB key
457	AllowImplicit dw 1 ; Allow implicit kernels
458	AllowOptions dw 1 ; User-specified options allowed
459	IncludeLevel dw 1 ; Nesting level
460	DefaultLevel dw 0 ; The current level of default
461	global PXERetry
462	PXERetry dw 0 ; Extra PXE retries
463	VKernel db 0 ; Have we seen any "label" statements?
464
465	%if IS_PXELINUX
466	IPAppend db 0 ; Default IPAPPEND option
467	%endif
468
469	section .uibss
470	alignb 4 ; For the good of REP MOVSD
471	command_line resb max_cmd_len+2 ; Command line buffer
472	alignb 4
473	default_cmd resb max_cmd_len+1 ; "default" command line

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