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| author | York Sun <yorksun@freescale.com> | 2015-12-04 11:57:07 -0800 |
|---|---|---|
| committer | York Sun <yorksun@freescale.com> | 2015-12-15 08:57:32 +0800 |
| commit | e81495224f732f17ae6f379baf23b90cd1d5cb5f (patch) | |
| tree | f0e798cad86d64d6c2978307c94299f7f30eb208 /include/asm-generic | |
| parent | 000f4e7686f4291fbd74d8920b586caf10f9241f (diff) | |
| download | blackbird-obmc-uboot-e81495224f732f17ae6f379baf23b90cd1d5cb5f.tar.gz blackbird-obmc-uboot-e81495224f732f17ae6f379baf23b90cd1d5cb5f.zip | |
Reserve secure memory
Secure memory is at the end of memory, separated and reserved
from OS, tracked by gd->secure_ram. Secure memory can host
MMU tables, security monitor, etc. This is different from PRAM
used to reserve private memory. PRAM offers memory at the top
of u-boot memory, not necessarily the real end of memory for
systems with very large DDR. Using the end of memory simplifies
MMU setup and avoid memory fragmentation.
"bdinfo" command shows gd->secure_ram value if this memory is
marked as secured.
Signed-off-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/global_data.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h index 1abdcaa6b7..5d8b043f14 100644 --- a/include/asm-generic/global_data.h +++ b/include/asm-generic/global_data.h @@ -59,6 +59,20 @@ typedef struct global_data { unsigned long relocaddr; /* Start address of U-Boot in RAM */ phys_size_t ram_size; /* RAM size */ +#ifdef CONFIG_SYS_MEM_RESERVE_SECURE +#define MEM_RESERVE_SECURE_SECURED 0x1 +#define MEM_RESERVE_SECURE_MAINTAINED 0x2 +#define MEM_RESERVE_SECURE_ADDR_MASK (~0x3) + /* + * Secure memory addr + * This variable needs maintenance if the RAM base is not zero, + * or if RAM splits into non-consecutive banks. It also has a + * flag indicating the secure memory is marked as secure by MMU. + * Flags used: 0x1 secured + * 0x2 maintained + */ + phys_addr_t secure_ram; +#endif unsigned long mon_len; /* monitor len */ unsigned long irq_sp; /* irq stack pointer */ unsigned long start_addr_sp; /* start_addr_stackpointer */ |
