[PATCH 2/2] ARCv2: boot log: identify HS48 cores (dual issue)

[Vineet Gupta]

Signed-off-by: Vineet Gupta <vgu...@synopsys.com>
---
 arch/arc/include/asm/arcregs.h |  3 ++-
 arch/arc/kernel/setup.c        | 17 ++++++++++++++---
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h
index b71d84873f7d..b1c56d35f2a9 100644
--- a/arch/arc/include/asm/arcregs.h
+++ b/arch/arc/include/asm/arcregs.h
@@ -98,6 +98,7 @@
 
 /* Auxiliary registers */
 #define AUX_IDENTITY           4
+#define AUX_EXEC_CTRL          8
 #define AUX_INTR_VEC_BASE      0x25
 #define AUX_VOL                        0x5e
 
@@ -269,7 +270,7 @@ struct cpuinfo_arc {
        struct cpuinfo_arc_ccm iccm, dccm;
        struct {
                unsigned int swap:1, norm:1, minmax:1, barrel:1, crc:1, 
swape:1, pad1:2,
-                            fpu_sp:1, fpu_dp:1, pad2:6,
+                            fpu_sp:1, fpu_dp:1, dual_iss_enb:1, 
dual_iss_exist:1, pad2:4,
                             debug:1, ap:1, smart:1, rtt:1, pad3:4,
                             timer0:1, timer1:1, rtc:1, gfrc:1, pad4:4;
        } extn;
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index 228593a964f8..fb83844daeea 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -51,6 +51,7 @@ static const struct id_to_str arc_cpu_rel[] = {
        { 0x51, "R2.0" },
        { 0x52, "R2.1" },
        { 0x53, "R3.0" },
+       { 0x54, "R4.0" },
 #endif
        { 0x00, NULL   }
 };
@@ -62,6 +63,7 @@ static const struct id_to_str arc_cpu_nm[] = {
 #else
        { 0x40, "ARC EM"  },
        { 0x50, "ARC HS38"  },
+       { 0x54, "ARC HS48"  },
 #endif
        { 0x00, "Unknown"   }
 };
@@ -133,7 +135,7 @@ static void read_arc_build_cfg_regs(void)
        }
 
        for (tbl = &arc_cpu_nm[0]; tbl->id != 0; tbl++) {
-               if ((cpu->core.family & 0xF0) == tbl->id)
+               if ((cpu->core.family & 0xF4) == tbl->id)
                        break;
        }
        cpu->name = tbl->str;
@@ -192,6 +194,14 @@ static void read_arc_build_cfg_regs(void)
                cpu->bpu.full = bpu.ft;
                cpu->bpu.num_cache = 256 << bpu.bce;
                cpu->bpu.num_pred = 2048 << bpu.pte;
+
+               if (cpu->core.family >= 0x54) {
+                       unsigned int exec_ctrl;
+
+                       READ_BCR(AUX_EXEC_CTRL, exec_ctrl);
+                       cpu->extn.dual_iss_exist = 1;
+                       cpu->extn.dual_iss_enb = exec_ctrl & 1;
+               }
        }
 
        READ_BCR(ARC_REG_AP_BCR, bcr);
@@ -239,10 +249,11 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, 
int len)
                       "\nIDENTITY\t: ARCVER [%#02x] ARCNUM [%#02x] CHIPID 
[%#4x]\n",
                       core->family, core->cpu_id, core->chip_id);
 
-       n += scnprintf(buf + n, len - n, "processor [%d]\t: %s %s (%s ISA) 
%s\n",
+       n += scnprintf(buf + n, len - n, "processor [%d]\t: %s %s (%s ISA) 
%s%s%s\n",
                       cpu_id, cpu->name, cpu->details,
                       is_isa_arcompact() ? "ARCompact" : "ARCv2",
-                      IS_AVAIL1(cpu->isa.be, "[Big-Endian]"));
+                      IS_AVAIL1(cpu->isa.be, "[Big-Endian]"),
+                      IS_AVAIL3(cpu->extn.dual_iss_exist, 
cpu->extn.dual_iss_enb, " Dual-Issue"));
 
        n += scnprintf(buf + n, len - n, "Timers\t\t: %s%s%s%s%s%s\nISA Extn\t: 
",
                       IS_AVAIL1(cpu->extn.timer0, "Timer0 "),
-- 
2.7.4


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