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| author | Daniel Hellstrom <daniel@gaisler.com> | 2010-01-25 09:56:08 +0100 |
|---|---|---|
| committer | Francois Retief <fgretief@spaceteq.co.za> | 2015-11-13 10:23:33 +0200 |
| commit | cff009ed6ff7da2e87f8213d34ed869be4373604 (patch) | |
| tree | 0ef3637876bb35d7341f8eb3d656ab80e8fc198b /arch/sparc/cpu/leon3/start.S | |
| parent | 3f33f6a28b7a823bfa19157353e8b7c78c63f63c (diff) | |
| download | blackbird-obmc-uboot-cff009ed6ff7da2e87f8213d34ed869be4373604.tar.gz blackbird-obmc-uboot-cff009ed6ff7da2e87f8213d34ed869be4373604.zip | |
sparc: leon3: Added memory controller initialization using new AMBA PnP routines.
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Diffstat (limited to 'arch/sparc/cpu/leon3/start.S')
| -rw-r--r-- | arch/sparc/cpu/leon3/start.S | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/arch/sparc/cpu/leon3/start.S b/arch/sparc/cpu/leon3/start.S index be9b3fb20b..203114970b 100644 --- a/arch/sparc/cpu/leon3/start.S +++ b/arch/sparc/cpu/leon3/start.S @@ -13,6 +13,12 @@ #include <asm/stack.h> #include <asm/leon.h> #include <version.h> +#include <ambapp.h> + +/* Default Plug&Play I/O area */ +#ifndef CONFIG_AMBAPP_IOAREA +#define CONFIG_AMBAPP_IOAREA AMBA_DEFAULT_IOAREA +#endif /* Entry for traps which jump to a programmer-specified trap handler. */ #define TRAPR(H) \ @@ -208,6 +214,7 @@ version_string: .ascii U_BOOT_VERSION_STRING, "\0" .section ".text" + .extern _nomem_amba_init, _nomem_memory_ctrl_init .align 4 _hardreset: @@ -259,6 +266,38 @@ stackp: andn %fp, 0x0f, %fp sub %fp, 64, %sp +/* Obtain the address of _GLOBAL_OFFSET_TABLE_ */ + SPARC_PIC_THUNK_CALL(l7) + +/* Scan AMBA Bus for AMBA buses using PnP information. All found + * AMBA buses I/O area will be located in i0-i5 upon return. + * The i0-i5 registers are later used by _nomem_amba_init2 + */ +ambainit: + call _nomem_amba_init + sethi %hi(CONFIG_AMBAPP_IOAREA), %o0 + +/* Scan AMBA Buses for memory controllers, then initialize the + * memory controllers. Note that before setting up the memory controller + * the stack can not be used. + */ +memory_ctrl_init: + SPARC_LOAD_ADDRESS(grlib_mctrl_handlers, l7, o0) + + call _nomem_memory_ctrl_init + nop + +/* The return valu indicate how many memory controllers where found and + * initialized, if no memory controller was initialized, we can not continue + * because from here on we expect memory to be working. + */ + cmp %o0, 0 +memory_ctrl_init_failed: + beq memory_ctrl_init_failed + nop + +/*** From now on the stack can be used. ***/ + cpu_init_unreloc: call cpu_init_f nop @@ -269,7 +308,6 @@ cpu_init_unreloc: /* un relocated end address of monitor */ #define DATA_END __init_end - SPARC_PIC_THUNK_CALL(l7) reloc: SPARC_LOAD_ADDRESS(TEXT_START, l7, g2) SPARC_LOAD_ADDRESS(DATA_END, l7, g3) @@ -389,6 +427,7 @@ jump: SPARC_LOAD_ADDRESS(board_init_f, l7, o1) set CONFIG_SYS_RELOC_MONITOR_BASE,%o2 + SPARC_LOAD_ADDRESS(TEXT_START, l7, g1) add %o1,%o2,%o1 sub %o1,%g1,%o1 call %o1 |
