diff options
Diffstat (limited to 'include/mem-map.h')
-rw-r--r-- | include/mem-map.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/include/mem-map.h b/include/mem-map.h new file mode 100644 index 0000000..effd689 --- /dev/null +++ b/include/mem-map.h @@ -0,0 +1,114 @@ +/* Copyright 2013-2014 IBM Corp. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef __MEM_MAP_H +#define __MEM_MAP_H + +/* This is our main offset for relocation. All our buffers + * are offset from that and our code relocates itself to + * that location + */ +#define SKIBOOT_BASE 0x30000000 + +/* Stack size set to 16K, some of it will be used for + * machine check (see stack.h) + */ +#define STACK_SHIFT 14 +#define STACK_SIZE (1 << STACK_SHIFT) + +/* The NACA and other stuff in head.S need to be at the start: we + * give it 64k before placing the SPIRA and related data. + */ +#define SPIRA_OFF 0x00010000 + +/* SPIRA is 2k, then follow with for proc_init_data (aka PROCIN). + * These need to be at fixed addresses in case we're ever little + * endian: linker can't endian reverse a pointer for us. Text, data + * et. al. follows this. + */ +#define PROCIN_OFF (SPIRA_OFF + 0x800) + +/* Initial MDST table like PROCIN, we need fixed addresses, + * we leave a 2k gap for PROCIN + */ +#define MDST_TABLE_OFF (SPIRA_OFF + 0x1000) + +/* We keep a gap of 2M for skiboot text & bss for now. We will + * then we have our heap which goes up to base + 14M (so 12M for + * now, though we can certainly reduce that a lot). + * + * Ideally, we should fix the heap end and use _end to basically + * initialize our heap so that it covers anything from _end to + * that heap end, avoiding wasted space. + * + * That's made a bit tricky however due to how we create those + * regions statically in mem_region.c, but still on the list of + * things to improve. + * + * As of this writing (2014/4/6), we use approc 512K for skiboot + * core and 2M of heap on a 1 socket machine. + */ +#define HEAP_BASE (SKIBOOT_BASE + 0x00200000) +#define HEAP_SIZE 0x00c00000 + +/* This is our PSI TCE table. It's 16K entries on P7 and 256K + * entries on P8 + */ +#define PSI_TCE_TABLE_BASE (SKIBOOT_BASE + 0x00e00000) +#define PSI_TCE_TABLE_SIZE_P7 0x00020000UL +#define PSI_TCE_TABLE_SIZE_P8 0x00200000UL + +/* This is the location of our console buffer at base + 16M */ +#define INMEM_CON_START (SKIBOOT_BASE + 0x01000000) +#define INMEM_CON_LEN 0x100000 + +/* This is the location of HBRT console buffer at base + 17M */ +#define HBRT_CON_START (SKIBOOT_BASE + 0x01100000) +#define HBRT_CON_LEN 0x100000 + +/* Tell FSP to put the init data at base + 20M, allocate 8M */ +#define SPIRA_HEAP_BASE (SKIBOOT_BASE + 0x01200000) +#define SPIRA_HEAP_SIZE 0x00800000 + +/* Total size of the above area + * + * (Ensure this has at least a 64k alignment) + */ +#define SKIBOOT_SIZE 0x01a00000 + +/* We start laying out the CPU stacks from here, indexed by PIR + * each stack is STACK_SIZE in size (naturally aligned power of + * two) and the bottom of the stack contains the cpu thread + * structure for the processor, so it can be obtained by a simple + * bit mask from the stack pointer. + * + * The size of this array is dynamically determined at boot time + */ +#define CPU_STACKS_BASE (SKIBOOT_BASE + SKIBOOT_SIZE) + +/* + * Address at which we load the kernel LID. This is also where + * we expect a passed-in kernel if booting without FSP and + * without a built-in kernel. + */ +#define KERNEL_LOAD_BASE ((void *)0x20000000) +#define KERNEL_LOAD_SIZE 0x10000000 + +/* Size allocated to build the device-tree */ +#define DEVICE_TREE_MAX_SIZE 0x80000 + + +#endif /* __MEM_MAP_H */ |