[Qemu-devel] [PULL 03/30] target-mips: Add 5KEc and 5KEf MIPS64r2 processors

[Leon Alrae <leon.alrae@imgtec.com>]

From: "Maciej W. Rozycki" <macro@codesourcery.com>

Add the 5KEc and 5KEf processors from MIPS Technologies that are the
original implementation of the MIPS64r2 ISA.

Silicon for these processors has never been taped out and no soft cores
were released even.  They do exist though, a CP0.PRId value has been
assigned and experimental RTLs produced at the time the MIPS64r2 ISA has
been finalized.  The settings introduced here faithfully reproduce that
hardware.

As far the implementation goes these processors are the same as the 5Kc
and the 5Kf CPUs respectively, except implementing the MIPS64r2 rather
than the original MIPS64 instruction set.  There must have been some
updates to the CP0 architecture as mandated by the ISA, such as the
addition of the EBase register, although I am not sure about the exact
details, no documentation has ever been produced for these processors.
The remaining parts of the microarchitecture, in particular the
pipeline, stayed unchanged.  Or to put it another way, the difference
between a 5K and a 5KE CPU corresponds to one between a 4K and a 4KE
CPU, except for the 64-bit rather than 32-bit ISA.

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
---
 target-mips/translate_init.c | 45 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/target-mips/translate_init.c b/target-mips/translate_init.c
index 148b394..607f1c8 100644
--- a/target-mips/translate_init.c
+++ b/target-mips/translate_init.c
@@ -520,6 +520,51 @@ static const mips_def_t mips_defs[] =
         .mmu_type = MMU_TYPE_R4000,
     },
     {
+        .name = "5KEc",
+        .CP0_PRid = 0x00018900,
+        .CP0_Config0 = MIPS_CONFIG0 | (0x1 << CP0C0_AR) | (0x2 << CP0C0_AT) |
+                       (MMU_TYPE_R4000 << CP0C0_MT),
+        .CP0_Config1 = MIPS_CONFIG1 | (31 << CP0C1_MMU) |
+                       (1 << CP0C1_IS) | (4 << CP0C1_IL) | (1 << CP0C1_IA) |
+                       (1 << CP0C1_DS) | (4 << CP0C1_DL) | (1 << CP0C1_DA) |
+                       (1 << CP0C1_PC) | (1 << CP0C1_WR) | (1 << CP0C1_EP),
+        .CP0_Config2 = MIPS_CONFIG2,
+        .CP0_Config3 = MIPS_CONFIG3,
+        .CP0_LLAddr_rw_bitmask = 0,
+        .CP0_LLAddr_shift = 4,
+        .SYNCI_Step = 32,
+        .CCRes = 2,
+        .CP0_Status_rw_bitmask = 0x32F8FFFF,
+        .SEGBITS = 42,
+        .PABITS = 36,
+        .insn_flags = CPU_MIPS64R2,
+        .mmu_type = MMU_TYPE_R4000,
+    },
+    {
+        .name = "5KEf",
+        .CP0_PRid = 0x00018900,
+        .CP0_Config0 = MIPS_CONFIG0 | (0x1 << CP0C0_AR) | (0x2 << CP0C0_AT) |
+                       (MMU_TYPE_R4000 << CP0C0_MT),
+        .CP0_Config1 = MIPS_CONFIG1 | (1 << CP0C1_FP) | (31 << CP0C1_MMU) |
+                       (1 << CP0C1_IS) | (4 << CP0C1_IL) | (1 << CP0C1_IA) |
+                       (1 << CP0C1_DS) | (4 << CP0C1_DL) | (1 << CP0C1_DA) |
+                       (1 << CP0C1_PC) | (1 << CP0C1_WR) | (1 << CP0C1_EP),
+        .CP0_Config2 = MIPS_CONFIG2,
+        .CP0_Config3 = MIPS_CONFIG3,
+        .CP0_LLAddr_rw_bitmask = 0,
+        .CP0_LLAddr_shift = 4,
+        .SYNCI_Step = 32,
+        .CCRes = 2,
+        .CP0_Status_rw_bitmask = 0x36F8FFFF,
+        .CP1_fcr0 = (1 << FCR0_F64) | (1 << FCR0_L) | (1 << FCR0_W) |
+                    (1 << FCR0_D) | (1 << FCR0_S) |
+                    (0x89 << FCR0_PRID) | (0x0 << FCR0_REV),
+        .SEGBITS = 42,
+        .PABITS = 36,
+        .insn_flags = CPU_MIPS64R2,
+        .mmu_type = MMU_TYPE_R4000,
+    },
+    {
         /* A generic CPU supporting MIPS64 Release 6 ISA.
            FIXME: Support IEEE 754-2008 FP and misaligned memory accesses.
                   Eventually this should be replaced by a real CPU model. */
-- 
2.1.0