Re: [Qemu-devel] PMON2000 compilation and kernel question

[Andrew Randrianasulu <randrianasulu@gmail.com>]

> What do you mean by DIMM size not detected?

Sorry, I mean "No DIMM in slot 1" message.

PMON2000 MIPS Initializing. Standby...
ERRORPC=00000000 CONFIG=00030932
 PRID=00006302
DIMM read
read memory type
read number of rows
read blocks per ddrram
read number of sides
read width
00000002
No DIMM in slot 1
DIMM SIZE=10000000
sdcfg=2d5043df
msize=10000000
Init SDRAM Done!
Sizing caches...
Init caches...
godson2 caches found
Init caches done, cfg = 00030932

Copy PMON to execute location...
  start = 0x81000000
  s0 = 0x3ec00000
a1050000
copy text section done.
Copy PMON to execute location done.
sp=80ffc000Uncompressing Bios........................OK,Booting Bios

[...]

with binary I got:

PMON2000 MIPS Initializing. Standby...
ERRORPC=00000000 CONFIG=00030932
 PRID=00006302
DIMM read
00000080
read memory type
read number of rows
read memory size per side
read blocks per ddrram
read number of sides
read width
DIMM SIZE=10000000
sdcfg=3d5043df
msize=10000000
Init SDRAM Done!
Sizing caches...
Init caches...
godson2 caches found
Init caches done, cfg = 00030932

Copy PMON to execute location...
  start = 0x85000000
  s0 = 0x3ac00000
a5040000
copy text section done.
Copy PMON to execute location done.
sp=84ffc000Uncompressing Bios........................OK,Booting Bios


As far as I understand those values come from 
Targets/Bonito2edev/Bonito/start.S

#include "i2c.S"
        beqz msize,.nodimm
        nop
        b 2f
        nop
.nodimm:
        move    dbg,a0
        PRINTSTR ("\r\nNo DIMM in all slots,use default configure\r\n")
        li  msize,0x10000000
        li      sdCfg,0x055043df         /* zgj-8-7-14-13 */
2:
        PRINTSTR("DIMM SIZE=")
        move    a0,msize
        bal     hexserial
        nop
        PRINTSTR("\r\n")

        li      t0, 0xbff00008
        sd      sdCfg, 0(t0)

        #### gx 2006-03-17: mode ####
        #li     t1,0x20
        li      t1,0x28
        li      t0, 0xbff00000
        sw      t1,0(t0)
        nop
        li      t1,0x0
        li      t0, 0xbff00000
        sw      t1,0x30(t0)
        nop


and in turn i2c.S has this:

Targets/Bonito2edev/Bonito/i2c.S

#define i2cread newi2cread
        li      msize,0
        PRINTSTR("DIMM read\r\n")

        /* only one memory slot, slave address is 1010000b */
        li      sdCfg,0x04000000 /*bit 26Н»·ўКЅ¶БРґК±µДїйДЪЛіРт*/
        li      a1, 0x0
    li      a0,0xa1
    bal     i2cread
        nop
        beq     v0,0xff,1f
        nop
        beq v0,0x80,1f
        nop
        move a0,v0
        bal hexserial
        nop
    PRINTSTR ("\r\nNo DIMM in slot 0 \r\n");
        b 2f
        nop
1:
        or      sdCfg, 0x1<<29
        nop
        li a0,0xa1
        bal ii2c_cfg
        nop
2:
        li      a1, 0x0
    li      a0,0xa3
    bal     i2cread
        nop
        li      a1,0x0
        beq     v0,0xff,1f
        nop
        beq v0,0x80,1f
        nop
        move a0,v0
        bal hexserial
        nop
    PRINTSTR ("\r\nNo DIMM in slot 1 \r\n");
        b 2f
        nop
1:
        li a0,0xa3
        bal ii2c_cfg
        nop

        b 2f
        nop

2:
        b 211f
        nop
==================

Ah, it talks about SLOT _1_ ! So, slot _0_ apparently read correctly .... 
but config info still not printed.... by pmon


Sorry, I misread output!