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ARCv2: boot report CCMs (Closely Coupled Memories)

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- ARCv2 uses a seperate BCR for {I,D}CCM base address:
  ARCompact encoded both base/size in same BCR

- Size encoding in common BCR is different for ARCompact/ARCv2

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta
2016-02-16 12:36:18 +05:30
parent 98341f7dc9
commit a150b085b6
2 changed files with 70 additions and 40 deletions
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78
arch/arc/kernel/setup.c
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@ -42,6 +42,53 @@ struct task_struct *_current_task[NR_CPUS]; /* For stack switching */
struct cpuinfo_arc cpuinfo_arc700[NR_CPUS];
static void read_decode_ccm_bcr(struct cpuinfo_arc *cpu)
{
if (is_isa_arcompact()) {
struct bcr_iccm_arcompact iccm;
struct bcr_dccm_arcompact dccm;
READ_BCR(ARC_REG_ICCM_BUILD, iccm);
if (iccm.ver) {
cpu->iccm.sz = 4096 << iccm.sz; /* 8K to 512K */
cpu->iccm.base_addr = iccm.base << 16;
}
READ_BCR(ARC_REG_DCCM_BUILD, dccm);
if (dccm.ver) {
unsigned long base;
cpu->dccm.sz = 2048 << dccm.sz; /* 2K to 256K */
base = read_aux_reg(ARC_REG_DCCM_BASE_BUILD);
cpu->dccm.base_addr = base & ~0xF;
}
} else {
struct bcr_iccm_arcv2 iccm;
struct bcr_dccm_arcv2 dccm;
unsigned long region;
READ_BCR(ARC_REG_ICCM_BUILD, iccm);
if (iccm.ver) {
cpu->iccm.sz = 256 << iccm.sz00; /* 512B to 16M */
if (iccm.sz00 == 0xF && iccm.sz01 > 0)
cpu->iccm.sz <<= iccm.sz01;
region = read_aux_reg(ARC_REG_AUX_ICCM);
cpu->iccm.base_addr = region & 0xF0000000;
}
READ_BCR(ARC_REG_DCCM_BUILD, dccm);
if (dccm.ver) {
cpu->dccm.sz = 256 << dccm.sz0;
if (dccm.sz0 == 0xF && dccm.sz1 > 0)
cpu->dccm.sz <<= dccm.sz1;
region = read_aux_reg(ARC_REG_AUX_DCCM);
cpu->dccm.base_addr = region & 0xF0000000;
}
}
}
static void read_arc_build_cfg_regs(void)
{
struct bcr_perip uncached_space;
@ -76,36 +123,11 @@ static void read_arc_build_cfg_regs(void)
cpu->extn.swap = read_aux_reg(ARC_REG_SWAP_BCR) ? 1 : 0; /* 1,3 */
cpu->extn.crc = read_aux_reg(ARC_REG_CRC_BCR) ? 1 : 0;
cpu->extn.minmax = read_aux_reg(ARC_REG_MIXMAX_BCR) > 1 ? 1 : 0; /* 2 */
/* Note that we read the CCM BCRs independent of kernel config
* This is to catch the cases where user doesn't know that
* CCMs are present in hardware build
*/
{
struct bcr_iccm iccm;
struct bcr_dccm dccm;
struct bcr_dccm_base dccm_base;
unsigned int bcr_32bit_val;
bcr_32bit_val = read_aux_reg(ARC_REG_ICCM_BCR);
if (bcr_32bit_val) {
iccm = *((struct bcr_iccm *)&bcr_32bit_val);
cpu->iccm.base_addr = iccm.base << 16;
cpu->iccm.sz = 0x2000 << (iccm.sz - 1);
}
bcr_32bit_val = read_aux_reg(ARC_REG_DCCM_BCR);
if (bcr_32bit_val) {
dccm = *((struct bcr_dccm *)&bcr_32bit_val);
cpu->dccm.sz = 0x800 << (dccm.sz);
READ_BCR(ARC_REG_DCCMBASE_BCR, dccm_base);
cpu->dccm.base_addr = dccm_base.addr << 8;
}
}
READ_BCR(ARC_REG_XY_MEM_BCR, cpu->extn_xymem);
/* Read CCM BCRs for boot reporting even if not enabled in Kconfig */
read_decode_ccm_bcr(cpu);
read_decode_mmu_bcr();
read_decode_cache_bcr();