TODO revision 1.25 
1$NetBSD: TODO,v 1.25 2007/03/04 09:09:10 tsutsui Exp $
2
3To do list (in some particular order)
4XXX some entries might be obsolete.
5
6    o	sysinst
7	maybe MD fdisk partitioning support is required to load files
8	from FAT partition on ARC BIOS prompt.
9
10    o	install notes
11
12
13    o	use MI driver
14
15	-   make fd driver MI, and share it with other ports
16	    (contact christos about MI fd driver)
17
18	-   use MI bha driver instead of home grown btl
19	    XXX needs fixes of DESKstation support
20
21    o	VXL framebuffer support (Magnum, RISCstation 2200)
22
23    o	com_jazzio.c
24	-   clock handling clean up (obtain from ARC BIOS)
25	-   fifo disabling may be only needed on some Magnum?
26
27    o	remove pccons and switch to wscons completely
28	(XXX what's the problem to remove pccons?)
29
30    o	AD1848 audio support
31
32    o	missing MI devices
33		ses?, vcoda, ...
34
35
36    o	Xserver
37
38	-   VXL		Magnum, RISCstation 2200
39	-   vga/S3	PICA, Image RISCstation - OpenBSD's?
40	-   vga/cirrus	RISCserver 2200, Express5800/240 R4400 EISA
41	-   vga/???	DESKstation Tyne, rPC44
42	-   TGA		RISCstation 2250, Express5800/230 R4400 PCI
43
44    o   Find out why bitmap load to S3-928 flashes screen. (X server)
45	Know why (enable linear mode). Need S3 info.
46
47
48    o	repair DESKstation support
49	-   requires bounce buffer bus_dma for Tyne
50		XXX - too small bounce buffer size (128KB)
51
52    o	Olivetti M700 support
53
54    o	NEC Express5800/230 R10000 PCI (NEC-J95) support
55	(needs MI R10000 support)
56
57    o	SNI RM200PCI/RM300/RM400/RM600 support
58
59
60    o	parse ARC BIOS configuration information and use it
61
62    o	increase MAXPHYS to 64KB
63	(XXX why is it limited to 32KB?)
64
65    o	fix kernel start address
66	(maybe requires bootloader support)
67
68    o	allocate PICA_TL_BASE dynamically
69
70    o	remove inb/outb
71
72    o	remove UADDR
73
74    o	fix mem_clusters[] usage.
75
76    o	intrcnt[] name cleanup, use MI evcnt(9)
77
78    o	test and merge soren's clean up about proc0.p_addr.
79
80    o	redesign interrupt handler framework.
81	i/o bus devices should have sane IPL, but currently doesn't.
82
83    o	make CLKF_INTR() work.
84
85    o	it is better to always disable the MIPS3 internal timer interrupts
86	(i.e. MIPS_INT_MASK_5) if it is not needed for the system.
87	those are the points which should be fixed:
88	mips_idle: li t0, (MIPS_INT_MASK | MIPS_SR_INT_IE)
89	machdep.c: curpcb->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE;
90	spl0()
91	splnone()
92
93    o	XXX at least 2000/06/07 version is already quite unstable
94	on PICA and NEC Image RISCstation. (but almost OK on Magnum)
95	Userland commands dumps	core randomly.
96	This version is before _MIPS_PADDR_T_64BIT changes
97	and MIPS3_TLB_WIRED_UPAGES changes.	
98
99	"vm_page_zero_enable = FALSE" makes this problem disappeared.
100	(vm_page_zero_enable = FALSE by default on all archs w/ UBC, now)
101
102	currently, page zero in the idle loop is also disabled on
103	untested platforms like DESKstation rPC44/Tyne and SNI for safety.
104
105	    XXX what's the current status of uvm_pageidlezero()?
106
107
108    o	resolve "XXX"
109
110
111(following entries might be MI MIPS items)
112
113    o	Move the RO and WIRED attribute from the pte to the pv table.
114	This saves four instructions in the tlb miss handler.
115
116    o   Can we have 32 double registers?
117
118    o	64bit kernel/userland
119
120    o	omit __SWAP_BROKEN in <mips/types.h>
121
122    o	clean up ALEAF/NLEAF/NON_LEAF/NNON_LEAF in userland.
123
124Lots of other things.....
125