diff options
Diffstat (limited to 'src/mainboard/emulation/qemu-armv7')
| -rw-r--r-- | src/mainboard/emulation/qemu-armv7/media.c | 4 | ||||
| -rw-r--r-- | src/mainboard/emulation/qemu-armv7/memlayout.ld | 33 |
2 files changed, 22 insertions, 15 deletions
diff --git a/src/mainboard/emulation/qemu-armv7/media.c b/src/mainboard/emulation/qemu-armv7/media.c index cb0b2757aa..e9feaf43c7 100644 --- a/src/mainboard/emulation/qemu-armv7/media.c +++ b/src/mainboard/emulation/qemu-armv7/media.c @@ -14,9 +14,9 @@ */ #include <boot_device.h> -/* Maps directly to qemu memory mapped space of 0x10000 up to rom size. */ +/* Maps directly to NOR flash up to rom size. */ static const struct mem_region_device boot_dev = - MEM_REGION_DEV_INIT((void *)0x10000, CONFIG_ROM_SIZE); + MEM_REGION_DEV_INIT((void *)0x0, CONFIG_ROM_SIZE); const struct region_device *boot_device_ro(void) { diff --git a/src/mainboard/emulation/qemu-armv7/memlayout.ld b/src/mainboard/emulation/qemu-armv7/memlayout.ld index 0b139a2742..1b3a48bad3 100644 --- a/src/mainboard/emulation/qemu-armv7/memlayout.ld +++ b/src/mainboard/emulation/qemu-armv7/memlayout.ld @@ -18,26 +18,33 @@ #include <arch/header.ld> /* - * Memory map for qemu vexpress-a9: + * Memory map for qemu vexpress-a9 since + * 6ec1588e09770ac7e9c60194faff6101111fc7f0 (Jul 2014): * - * 0x0000_0000: jump instruction (by qemu) - * 0x0001_0000: bootblock (entry of kernel / firmware) - * 0x0002_0000: romstage, assume up to 128KB in size. - * 0x0007_ff00: stack pointer - * 0x0010_0000: CBFS header - * 0x0011_0000: CBFS data - * 0x0100_0000: reserved for ramstage + * 0x0000_0000: NOR flash * 0x1000_0000: I/O map address + * 0x6000_0000: RAM */ +/* + * This map is designed to work with new qemu vexpress memory layout and + * with -bios option which neatly puts coreboot into flash and so payloads + * can find CBFS and we don't risk overwriting CBFS. + * + * Prior to Jul 2014 qemu aliased 0 to begining of RAM instead of flash + * and -bios was unusable as $pc pointed to 0 which was zero-filled as a + * workaround we suggested using -kernel but this still had all the issues + * of having fake-ROM in RAM. In fact it was even worse as fake ROM ends + * up exactly at addresses needed to load Linux. + */ SECTIONS { /* TODO: does this thing emulate SRAM? */ - BOOTBLOCK(0x10000, 64K) - ROMSTAGE(0x20000, 128K) - STACK(0x000FC000, 16K) + BOOTBLOCK(0x00000, 64K) - DRAM_START(0x01000000) - RAMSTAGE(0x01000000, 16M) + DRAM_START(0x60000000) + STACK(0x60000000, 64K) + ROMSTAGE(0x60010000, 128K) + RAMSTAGE(0x60030000, 16M) } |