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powerpc/mp: add support for discontiguous cores

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Some SOCs have discontiguously-numbered cores, and so we can't determine the
valid core numbers via the FRR register any more.  We define
CPU_TYPE_ENTRY_MASK to specify a discontiguous core mask, and helper functions
to process the mask and enumerate over the set of valid cores.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Timur Tabi
2011-08-05 16:15:24 -05:00
committed by Kumar Gala
parent 86df5142a1
commit fbb9ecf749
8 changed files with 78 additions and 29 deletions
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27
arch/powerpc/cpu/mpc85xx/mp.c
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@@ -221,14 +221,14 @@ ulong get_spin_virt_addr(void)
#ifdef CONFIG_FSL_CORENET
static void plat_mp_up(unsigned long bootpg)
{
u32 up, cpu_up_mask, whoami;
u32 cpu_up_mask, whoami;
u32 *table = (u32 *)get_spin_virt_addr();
volatile ccsr_gur_t *gur;
volatile ccsr_local_t *ccm;
volatile ccsr_rcpm_t *rcpm;
volatile ccsr_pic_t *pic;
int timeout = 10;
u32 nr_cpus;
u32 mask = cpu_mask();
struct law_entry e;
gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
@@ -236,8 +236,6 @@ static void plat_mp_up(unsigned long bootpg)
rcpm = (void *)(CONFIG_SYS_FSL_CORENET_RCPM_ADDR);
pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
nr_cpus = ((in_be32(&pic->frr) >> 8) & 0xff) + 1;
whoami = in_be32(&pic->whoami);
cpu_up_mask = 1 << whoami;
out_be32(&ccm->bstrl, bootpg);
@@ -251,19 +249,18 @@ static void plat_mp_up(unsigned long bootpg)
/* disable time base at the platform */
out_be32(&rcpm->ctbenrl, cpu_up_mask);
/* release the hounds */
up = ((1 << nr_cpus) - 1);
out_be32(&gur->brrl, up);
out_be32(&gur->brrl, mask);
/* wait for everyone */
while (timeout) {
int i;
for (i = 0; i < nr_cpus; i++) {
if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
cpu_up_mask |= (1 << i);
};
unsigned int i, cpu, nr_cpus = cpu_numcores();
if ((cpu_up_mask & up) == up)
for_each_cpu(i, cpu, nr_cpus, mask) {
if (table[cpu * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
cpu_up_mask |= (1 << cpu);
}
if ((cpu_up_mask & mask) == mask)
break;
udelay(100);
@@ -272,7 +269,7 @@ static void plat_mp_up(unsigned long bootpg)
if (timeout == 0)
printf("CPU up timeout. CPU up mask is %x should be %x\n",
cpu_up_mask, up);
cpu_up_mask, mask);
/* enable time base at the platform */
out_be32(&rcpm->ctbenrl, 0);
@@ -283,7 +280,7 @@ static void plat_mp_up(unsigned long bootpg)
mtspr(SPRN_TBWU, 0);
mtspr(SPRN_TBWL, 0);
out_be32(&rcpm->ctbenrl, (1 << nr_cpus) - 1);
out_be32(&rcpm->ctbenrl, mask);
#ifdef CONFIG_MPC8xxx_DISABLE_BPTR
/*