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changes to make smp work in linux

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console/console.c:
    Remove Printed SimOS references and replace with M5
    Rework the SMP stuff, so we don't trash any stacks, or what we
    thought were stacks, but are actually other ppls memory.
console/dbmentry.s:
    add a carefully crafted piece of assembly that doesn't use the stack,
    so we don't clobber anthing in the time between when we are spinning
    and when the OS tells us to go.
palcode/platform_m5.s:
    add/fix code for IPI, multiprocessor interrupts (DIR), and initial
    bootstrapping of the cpu
This commit is contained in:
Ali Saidi 2004-09-01 00:23:00 -04:00
parent 29c5218e4f
commit 1940fcdd29
3 changed files with 93 additions and 57 deletions
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54
system/alpha/console/console.c
View file

@ -152,19 +152,12 @@ main(int argc, char **argv)
InitConsole();
printf("SimOS console \n");
printf("M5 console\n");
/*
* get configuration from backdoor
*/
simosConf.last_offset = k1Conf->last_offset;
printf(" Got simosConfiguration %d \n",simosConf.last_offset);
/* for (i=1;i<=simosConf.last_offset/4;i++) {
ui *k1ptr = (ui*)k1Conf + i;
ui *ksegptr = (ui*)(&simosConf.last_offset)+i;
*ksegptr = *k1ptr;
}*/
printf("Got Configuration %d \n",simosConf.last_offset);
simosConf.last_offset = k1Conf->last_offset;
simosConf.version = k1Conf->version;
@ -186,7 +179,7 @@ main(int argc, char **argv)
simosConf.bootStrapCPU = k1Conf->bootStrapCPU;
if (simosConf.version != ALPHA_ACCESS_VERSION) {
panic("Console version mismatch. Console expects %d. SimOS has %d \n",
panic("Console version mismatch. Console expects %d. has %d \n",
ALPHA_ACCESS_VERSION,simosConf.version);
}
@ -227,8 +220,8 @@ struct rpb xxm_rpb = {
#if 0
0x12, /* 050: system type - masquarade as some random 21064 */
#endif
0, /* masquerade a Tsunami RGD */
(1<<10), /* 058: system variation */
0, /* OVERRIDDEN */
(1<<10), /* 058: system variation OVERRIDDEN */
'c'|('o'<<8)|('o'<<16)|('l'<< 24), /* 060: system revision */
1024*4096, /* 068: scaled interval clock intr freq OVERRIDEN*/
0, /* 070: cycle counter frequency */
@ -268,17 +261,17 @@ ul xxm_tbb[] = { 0x1e1e1e1e1e1e1e1e, 0x1e1e1e1e1e1e1e1e, 0x1e1e1e1e1e1e1e1e, 0x1
0x1e1e1e1e1e1e1e1e, 0x1e1e1e1e1e1e1e1e, 0x1e1e1e1e1e1e1e1e, 0x1e1e1e1e1e1e1e1e};
struct rpb_percpu xxm_rpb_percpu = {
{0,0,0,0,0,0,0,{0,0},{0,0,0,0,0,0,0,0}}, /* 000: boot/restart HWPCB */
{0,0,0,0,0,0,1,{0,0},{0,0,0,0,0,0,0,0}}, /* 000: boot/restart HWPCB */
(STATE_PA | STATE_PP | STATE_CV | STATE_PV | STATE_PMV | STATE_PL), /* 080: per-cpu state bits */
0xc000, /* 088: palcode memory length */
0x2000, /* 090: palcode scratch length */
0x4000, /* 098: phys addr of palcode mem space */
0x2000, /* 0A0: phys addr of palcode scratch space */
(2 << 16) | (5 << 8) | 1, /* 0A8: PALcode rev required */
5 | (2L << 32), /* 0B0: processor type */
11 | (2L << 32), /* 0B0: processor type */
7, /* 0B8: processor variation */
'D'|('a'<<8)|('v'<<16)|('e'<<24), /* 0C0: processor revision */
{'D','a','v','e','C','o','n','r','o','y',0,0,0,0,0,0}, /* 0C8: proc serial num: 10 ascii chars */
'M'|('5'<<8)|('A'<<16)|('0'<<24), /* 0C0: processor revision */
{'M','5','/','A','l','p','h','a','0','0','0','0','0','0','0','0'}, /* 0C8: proc serial num: 10 ascii chars */
0, /* 0D8: phys addr of logout area */
0, /* 0E0: length in bytes of logout area */
0, /* 0E8: halt pcb base */
@ -795,7 +788,7 @@ unixBoot(int go, int argc, char **argv)
rpb_name = (char *) ROUNDUP8(((ul)rpb_lurt) + sizeof(xxm_lurt));
rpb_dsr->rpb_sysname_off = ((ul) rpb_name) - (ul) rpb_dsr;
#define THENAME " SimOS ALPHA/EV5"
#define THENAME " M5/Alpha "
sum = sizeof(THENAME);
bcopy(THENAME, rpb_name, sum);
*(ul *)rpb_name = sizeof(THENAME); /* put in length field */
@ -1246,6 +1239,9 @@ void SlaveCmd(int cpu, struct rpb_percpu *my_rpb)
/* extern void palJToSlave[]; */
extern unsigned int palJToSlave[];
SpinLock(&theLock);
printf("Slave CPU %d console command %s", cpu,my_rpb->rpb_iccb.iccb_rxbuf);
SpinUnlock(&theLock);
my_rpb->rpb_state |= STATE_BIP;
my_rpb->rpb_state &= ~STATE_RC;
@ -1264,6 +1260,8 @@ void SlaveCmd(int cpu, struct rpb_percpu *my_rpb)
rpb->rpb_restart_pv,
rpb->rpb_vptb,
KSEG_TO_PHYS(my_rpb));
panic("SlaveCmd returned \n");
}
void SlaveLoop( int cpu)
@ -1272,7 +1270,6 @@ void SlaveLoop( int cpu)
struct rpb_percpu *my_rpb = (struct rpb_percpu*)
((ul)rpb_percpu + size*cpu);
SpinLock(&theLock);
if (cpu==0) {
panic("CPU 0 entering slaveLoop. Reenetering the console. HOSED \n");
@ -1280,19 +1277,10 @@ void SlaveLoop( int cpu)
printf("Entering slaveloop for cpu %d my_rpb=%x \n",cpu,my_rpb);
}
SpinUnlock(&theLock);
while(1) {
int i;
for (i=0; i < 1000000 ; i++) {
if (my_rpb->rpb_iccb.iccb_rxlen) {
SpinLock(&theLock);
printf("Slave CPU %d console command %s",
cpu,my_rpb->rpb_iccb.iccb_rxbuf);
SpinUnlock(&theLock);
SlaveCmd(cpu,my_rpb);
panic("SlaveCmd returned \n");
}
}
printf("*");
}
}
// swap the processors context to the one in the
// rpb_percpu struct very carefully (i.e. no stack usage)
// so that linux knows which processor ends up in __smp_callin
// and we don't trash any data is the process
SlaveSpin(cpu,my_rpb,&my_rpb->rpb_iccb.iccb_rxlen);
}

29
system/alpha/console/dbmentry.s
View file

@ -210,4 +210,33 @@ SpinLock:
br zero,1b
.end SpinLock
.globl loadContext
.ent loadContext 2
loadContext:
.option O1
.frame sp, 0, ra
call_pal PAL_SWPCTX_ENTRY
ret zero, (ra)
.end loadContext
.globl SlaveSpin # Very carefully spin wait
.ent SlaveSpin 2 # and swap context without
SlaveSpin: # using any stack space
.option O1
.frame sp, 0, ra
mov a0, t0 # cpu number
mov a1, t1 # cpu rpb pointer (virtual)
mov a2, t2 # what to spin on
test: ldl t3, 0(t2)
beq t3, test
zapnot t1,0x1f,a0 # make rpb physical
call_pal PAL_SWPCTX_ENTRY # switch to pcb
mov t0, a0 # setup args for SlaveCmd
mov t1, a1
jsr SlaveCmd # call SlaveCmd
ret zero, (ra) # Should never be reached
.end SlaveSpin

65
system/alpha/palcode/platform_m5.s
View file

@ -432,20 +432,26 @@ EXPORT(sys_wripir)
// Convert the processor number to a CPU mask
//--
and r16,0xf, r14 // mask the top stuff (16 CPUs supported)
and r16,0x3, r14 // mask the top stuff (4 CPUs supported)
bis r31,0x1,r16 // get a one
sll r16,r14,r14 // shift the bit to the right place
sll r14,12,r14
//++
// Build the Broadcast Space base address
//--
lda r13,0xff8e(r31) // Load the upper address bits
sll r13,24,r13 // shift them to the top
lda r16,0xf01(r31)
sll r16,32,r16
ldah r13,0xa0(r31)
sll r13,8,r13
bis r16,r13,r16
lda r16,0x0080(r16)
//++
// Send out the IP Intr
//--
stqp r14, 0x40(r13) // Write to TLIPINTR reg WAS TLSB_TLIPINTR_OFFSET
stqp r14, 0(r16) // Tsunami MISC Register
wmb // Push out the store
hw_rei
@ -737,20 +743,21 @@ EXPORT(sys_interrupt)
//-
ALIGN_BRANCH
sys_int_23:
Read_TLINTRSUMx(r13,r10,r14) // read the right TLINTRSUMx
srl r13, 22, r13 // shift down to examine IPL17
or r31,0,r16 // IPI interrupt A0 = 0
lda r12,0xf01(r31) // build up an address for the MISC register
sll r12,16,r12
lda r12,0xa000(r12)
sll r12,16,r12
lda r12,0x080(r12)
Intr_Find_TIOP(r13,r14)
beq r14, 1f
ldq_p r10,0(r12) // read misc register
and r10,0x3,r10 // isolate CPUID
or r31,0x1,r14 // load r14 with bit to clear
sll r14,r10,r14 // left shift by CPU ID
sll r14,8,r14
stq_p r14, 0(r12) // clear the rtc interrupt
Get_TLSB_Node_Address(r14,r10)
lda r10, 0xac0(r10) // Get base TLILID address
ldlp r13, 0(r10) // Read the TLILID register
bne r13, pal_post_dev_interrupt
1: lda r16, osfint_c_passrel(r31) // passive release
br r31, pal_post_interrupt //
br r31, pal_post_interrupt // Notify the OS
ALIGN_BRANCH
@ -764,7 +771,7 @@ sys_int_22:
ldq_p r10,0(r12) // read misc register
and r10,0x3,r10 // isolate CPUID
or r31,0x10,r14 // load r9 with bit to clear
or r31,0x10,r14 // load r14 with bit to clear
sll r14,r10,r14 // left shift by CPU ID
stq_p r14, 0(r12) // clear the rtc interrupt
@ -811,10 +818,10 @@ sys_int_21:
lda r12,0x0080(r12)
ldqp r13, 0(r12) // read the MISC register for CPUID
and r13,0x1,r14 // grab LSB and shift left 2
sll r14,2,r14
and r13,0x2,r10 // grabl LSB+1 and shift left 5
sll r10,5,r10
and r13,0x1,r14 // grab LSB and shift left 6
sll r14,6,r14
and r13,0x2,r10 // grabl LSB+1 and shift left 9
sll r10,9,r10
mskbl r12,0,r12 // calculate DIRn address
lda r13,0x280(r31)
@ -1479,8 +1486,20 @@ sys_reset:
mtpr r1, pt_scbb // load scbb
mtpr r31, pt_prbr // clear out prbr
#ifdef SIMOS
// yes, this is ugly, but you figure out a better
// way to get the address of the kludge_initial_pcbb
// in r1 with an uncooperative assembler --ali
br r1, kludge_getpcb_addr
br r31, kludge_initial_pcbb
kludge_getpcb_addr:
ldqp r19, 0(r1)
sll r19, 44, r19
srl r19, 44, r19
mulq r19,4,r19
addq r19, r1, r1
addq r1,4,r1
// or zero,kludge_initial_pcbb,r1
GET_ADDR(r1, (kludge_initial_pcbb-pal_base), r1)
// GET_ADDR(r1, (kludge_initial_pcbb-pal_base), r1)
#else
mfpr r1, pal_base
//orig sget_addr r1, (kludge_initial_pcbb-pal$base), r1, verify=0// get address for temp pcbb
@ -2598,7 +2617,7 @@ check_done: // do these now and return
// .sbttl KLUDGE_INITIAL_PCBB - PCB for Boot use only
ALIGN_128
.globl kludge_initial_pcbb
kludge_initial_pcbb: // PCB is 128 bytes long
// .repeat 16
// .quad 0