/*- * Copyright (c) 2019 Leandro Lupori * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include /* #define CAS_DEBUG */ #ifdef CAS_DEBUG #define DPRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__) #else #define DPRINTF(fmt, ...) do { ; } while (0) #endif /* PVR */ #define PVR_CPU_P8E 0x004b0000 #define PVR_CPU_P8NVL 0x004c0000 #define PVR_CPU_P8 0x004d0000 #define PVR_CPU_P9 0x004e0000 #define PVR_CPU_MASK 0xffff0000 #define PVR_ISA_207 0x0f000004 #define PVR_ISA_300 0x0f000005 #define PVR_ISA_MASK 0xffffffff /* loader version of kernel's CPU_MAXSIZE */ #define MAX_CPUS ((uint32_t)256u) /* Option Vectors' settings */ /* length of ignored OV */ #define OV_IGN_LEN 0 /* byte 1 (of any OV) */ #define OV_IGN 0x80 /* Option Vector 5 */ /* byte 2 */ #define OV5_LPAR 0x80 #define OV5_SPLPAR 0x40 #define OV5_DRMEM 0x20 #define OV5_LP 0x10 #define OV5_ALPHA_PART 0x08 #define OV5_DMA_DELAY 0x04 #define OV5_DONATE_CPU 0x02 #define OV5_MSI 0x01 /* 9-12: max cpus */ #define OV5_MAX_CPUS(n) ((MAX_CPUS >> (3*8 - (n)*8)) & 0xff) /* 13-14: LoPAPR Level */ #define LOPAPR_LEVEL 0x0101 /* 1.1 */ #define OV5_LOPAPR_LEVEL(n) ((LOPAPR_LEVEL >> (8 - (n)*8)) & 0xff) /* byte 17: Platform Facilities */ #define OV5_RNG 0x80 #define OV5_COMP_ENG 0x40 #define OV5_ENC_ENG 0x20 /* byte 21: Sub-Processors */ #define OV5_NO_SUBPROCS 0 #define OV5_SUBPROCS 1 /* byte 23: interrupt controller */ #define OV5_INTC_XICS 0 /* byte 24: MMU */ #define OV5_MMU_INDEX 24 #define OV5_MMU_HPT 0 #define OV5_MMU_RADIX 0x40 #define OV5_MMU_EITHER 0x80 #define OV5_MMU_DYNAMIC 0xc0 /* byte 25: HPT MMU Extensions */ #define OV5_HPT_EXT_INDEX 25 #define OV5_HPT_GTSE 0x40 /* byte 26: Radix MMU Extensions */ #define OV5_RADIX_EXT_INDEX 26 #define OV5_RADIX_GTSE 0x40 struct pvr { uint32_t mask; uint32_t val; }; struct opt_vec_ignore { char data[2]; } __packed; struct opt_vec4 { char data[3]; } __packed; struct opt_vec5 { char data[27]; } __packed; static struct ibm_arch_vec { struct pvr pvr_list[7]; uint8_t num_opts; struct opt_vec_ignore vec1; struct opt_vec_ignore vec2; struct opt_vec_ignore vec3; struct opt_vec4 vec4; struct opt_vec5 vec5; } __packed ibm_arch_vec = { /* pvr_list */ { { htobe32(PVR_CPU_MASK), htobe32(PVR_CPU_P8) }, { htobe32(PVR_CPU_MASK), htobe32(PVR_CPU_P8E) }, { htobe32(PVR_CPU_MASK), htobe32(PVR_CPU_P8NVL) }, { htobe32(PVR_CPU_MASK), htobe32(PVR_CPU_P9) }, { htobe32(PVR_ISA_MASK), htobe32(PVR_ISA_207) }, { htobe32(PVR_ISA_MASK), htobe32(PVR_ISA_300) }, { 0, 0xffffffffu } /* terminator */ }, 4, /* num_opts (4 actually means 5 option vectors) */ { OV_IGN_LEN, OV_IGN }, /* OV1 */ { OV_IGN_LEN, OV_IGN }, /* OV2 */ { OV_IGN_LEN, OV_IGN }, /* OV3 */ /* OV4 (can't be ignored) */ { sizeof(struct opt_vec4) - 2, /* length (n-2) */ 0, 10 /* Minimum VP entitled capacity percentage * 100 * (if absent assume 10%) */ }, /* OV5 */ { sizeof(struct opt_vec5) - 2, /* length (n-2) */ 0, /* don't ignore */ OV5_LPAR | OV5_SPLPAR | OV5_LP | OV5_MSI, 0, 0, /* Cooperative Memory Over-commitment */ 0, /* Associativity Information Option */ 0, /* Binary Option Controls */ 0, /* Reserved */ 0, /* Reserved */ OV5_MAX_CPUS(0), OV5_MAX_CPUS(1), /* 10 */ OV5_MAX_CPUS(2), OV5_MAX_CPUS(3), OV5_LOPAPR_LEVEL(0), OV5_LOPAPR_LEVEL(1), 0, /* Reserved */ 0, /* Reserved */ 0, /* Platform Facilities */ 0, /* Reserved */ 0, /* Reserved */ 0, /* Reserved */ /* 20 */ OV5_NO_SUBPROCS, 0, /* DRMEM_V2 */ OV5_INTC_XICS, OV5_MMU_HPT, 0, 0 } }; int ppc64_cas(void) { phandle_t pkg; ihandle_t inst; cell_t err; uint8_t buf[16], idx, val; int i, len, rc, radix_mmu; const char *var; char *ov5; pkg = OF_finddevice("/chosen"); if (pkg == -1) { printf("cas: couldn't find /chosen\n"); return (-1); } len = OF_getprop(pkg, "ibm,arch-vec-5-platform-support", buf, sizeof(buf)); if (len == -1) /* CAS not supported */ return (0); radix_mmu = 0; ov5 = ibm_arch_vec.vec5.data; for (i = 0; i < len; i += 2) { idx = buf[i]; val = buf[i + 1]; DPRINTF("idx 0x%02x val 0x%02x\n", idx, val); switch (idx) { case OV5_MMU_INDEX: /* * Note that testing for OV5_MMU_RADIX/OV5_MMU_EITHER * also covers OV5_MMU_DYNAMIC. */ if ((val & OV5_MMU_RADIX) || (val & OV5_MMU_EITHER)) radix_mmu = 1; break; case OV5_RADIX_EXT_INDEX: if (val & OV5_RADIX_GTSE) ov5[idx] = OV5_RADIX_GTSE; break; case OV5_HPT_EXT_INDEX: default: break; } } if (!radix_mmu) /* * If radix is not supported, set radix_mmu to 0 to avoid * the kernel trying to use it and panic. */ setenv("radix_mmu", "0", 1); else if ((var = getenv("radix_mmu")) != NULL && var[0] == '0') radix_mmu = 0; else ov5[OV5_MMU_INDEX] = OV5_MMU_RADIX; inst = OF_open("/"); if (inst == -1) { printf("cas: failed to open / node\n"); return (-1); } DPRINTF("MMU 0x%02x RADIX_EXT 0x%02x\n", ov5[OV5_MMU_INDEX], ov5[OV5_RADIX_EXT_INDEX]); rc = OF_call_method("ibm,client-architecture-support", inst, 1, 1, &ibm_arch_vec, &err); if (rc != 0 || err) { printf("cas: CAS method returned an error: rc %d err %jd\n", rc, (intmax_t)err); rc = -1; } OF_close(inst); printf("cas: selected %s MMU\n", radix_mmu ? "radix" : "hash"); return (rc); }