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2003-09-26 Till Straumann <strauman@slac.stanford.edu>

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PR 497/bsps
	* bootloader/head.S: Let the bootloader shut down the
	network interface. NOTE: this involves a PPCBug system
	call and will hence fail if other software is used
	to boot. Need to #undef USE_PPCBUG in such cases!
This commit is contained in:
Joel Sherrill
2003-09-26 20:20:47 +00:00
parent 05e5896371
commit 1721cb849a
2 changed files with 46 additions and 12 deletions
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8
c/src/lib/libbsp/powerpc/shared/ChangeLog
View File

@@ -1,3 +1,11 @@
2003-09-26 Till Straumann <strauman@slac.stanford.edu>
PR 497/bsps
* bootloader/head.S: Let the bootloader shut down the
network interface. NOTE: this involves a PPCBug system
call and will hence fail if other software is used
to boot. Need to #undef USE_PPCBUG in such cases!
2003-09-04 Joel Sherrill <joel@OARcorp.com>
* bootloader/bootldr.h, bootloader/em86.c, bootloader/em86real.S,

50
c/src/lib/libbsp/powerpc/shared/bootloader/head.S
View File

@@ -28,8 +28,6 @@
#define ENBL_CACHES (HID0_DCE | HID0_ICE)
#define USE_PPCBUG
#undef USE_PPCBUG
#define PRINT_CHAR(c) \
addi r20,r3,0 ; \
@@ -67,6 +65,9 @@
GOT_ENTRY(banner_start)
GOT_ENTRY(banner_end)
#endif
#ifdef USE_PPCBUG
GOT_ENTRY(nioc_reset_packet)
#endif
END_GOT
.globl start
.type start,@function
@@ -75,7 +76,7 @@
* code area, so that simple C routines can be called.
*/
start:
#ifdef USE_PPCBUG
#if defined(USE_PPCBUG) && defined(DEBUG)
MONITOR_ENTER
#endif
bl 1f
@@ -121,19 +122,29 @@ start:
stw r4,4(bd)
stw r5,8(bd)
stw r6,12(bd)
lis r3,__size@sectoff@ha
stw r7,16(bd)
stw r8,20(bd)
addi r3,r3,__size@sectoff@l
stw r9,24(bd)
stw r10,28(bd)
stw r28,o_msr(bd)
stw r29,o_hid0(bd)
stw r31,o_r31(bd)
#ifdef USE_PPCBUG
/* Stop the network interface - otherwise, memory can get
* corrupted by the IF DMAing data into its old buffers or
* by writing descriptors...
*/
lwz r3,GOT(nioc_reset_packet)
li r10, 0x1d /* .NETCTRL */
sc
#endif
/* Call the routine to fill boot_data structure from residual data.
* And to find where the code has to be moved.
*/
lis r3,__size@sectoff@ha
addi r3,r3,__size@sectoff@l
bl early_setup
/* Now we need to relocate ourselves, where we are told to. First put a
@@ -189,12 +200,12 @@ moved: lwz r1,stack(bd)
* during this time!
*/
4:
#ifdef USE_PPCBUG
#if defined(USE_PPCBUG) && defined(DEBUG)
PRINT_CHAR('M')
#endif
bl MMUoff
#ifdef USE_PPCBUG
#if defined(USE_PPCBUG) && defined(DEBUG)
PRINT_CHAR('B')
#endif
bl flush_tlb
@@ -204,7 +215,7 @@ moved: lwz r1,stack(bd)
* But the 601 valid bit is in the BATL (IBAT only) and others are in
* the [ID]BATU. Bloat, bloat.. fortunately thrown away later.
*/
#ifdef USE_PPCBUG
#if defined(USE_PPCBUG) && defined(DEBUG)
PRINT_CHAR('T')
#endif
li r3,0
@@ -224,12 +235,12 @@ moved: lwz r1,stack(bd)
lis r3,__size@sectoff@ha
addi r3,r3,__size@sectoff@l
sync # We are going to touch SDR1 !
#ifdef USE_PPCBUG
#if defined(USE_PPCBUG) && defined(DEBUG)
PRINT_CHAR('i')
#endif
bl mm_init
#ifdef USE_PPCBUG
#if defined(USE_PPCBUG) && defined(DEBUG)
PRINT_CHAR('M')
#endif
bl MMUon
@@ -244,7 +255,7 @@ moved: lwz r1,stack(bd)
lwz r4,GOT(banner_end)
sc
#endif
#ifdef USE_PPCBUG
#if defined(USE_PPCBUG) && defined(DEBUG)
PRINT_CHAR('H')
#endif
bl setup_hw
@@ -440,7 +451,22 @@ codemove:
_size_codemove=.-codemove
.section ".data" # .rodata
.align 2
.align 4
#ifdef USE_PPCBUG
/* A control 'packet' for the .NETCTRL PPCBug syscall to
* reset a network interface. Let's hope they used the
* first one for booting!! (CLUN/DLUN == 0/0)
* Must be 4-byte aligned...
*/
nioc_reset_packet:
.byte 0 /* Contoller LUN */
.byte 0 /* Device LUN */
.word 0 /* status return */
.long 5 /* Command (5=RESET) */
.long 0 /* Mem. Addr. for real data (unused for reset) */
.long 0 /* Number of bytes */
.long 0 /* Status/Control Flags (unused for reset) */
#endif
#ifdef TEST_PPCBUG_CALLS
banner_start:
.ascii "This message was printed by PPCBug with MMU enabled"