.

common/board\_f.c

1    static int setup_dest_addr(void)
2    {
3            debug("Monitor len: %08lX\n", gd->mon_len);
4            /*
5             * Ram is setup, size stored in gd !!
6             */
7            debug("Ram size: %08lX\n", (ulong)gd->ram_size);
8    #ifdef CONFIG_SYS_MEM_RESERVE_SECURE
9            /* Reserve memory for secure MMU tables, and/or security monitor */
10            gd->ram_size -= CONFIG_SYS_MEM_RESERVE_SECURE;
11            /*
12             * Record secure memory location. Need recalcuate if memory splits
13             * into banks, or the ram base is not zero.
14             */
15            gd->arch.secure_ram = gd->ram_size;
16    #endif
17            /*
18             * Subtract specified amount of memory to hide so that it won't
19             * get "touched" at all by U-Boot. By fixing up gd->ram_size
20             * the Linux kernel should now get passed the now "corrected"
21             * memory size and won't touch it either. This has been used
22             * by arch/powerpc exclusively. Now ARMv8 takes advantage of
23             * thie mechanism. If memory is split into banks, addresses
24             * need to be calculated.
25             */
26            gd->ram_size = board_reserve_ram_top(gd->ram_size);
27    
28    #ifdef CONFIG_SYS_SDRAM_BASE
29            gd->ram_top = CONFIG_SYS_SDRAM_BASE;
30    #endif
31            gd->ram_top += get_effective_memsize();
32            gd->ram_top = board_get_usable_ram_top(gd->mon_len);
33            gd->relocaddr = gd->ram_top;
34            debug("Ram top: %08lX\n", (ulong)gd->ram_top);
35    #if defined(CONFIG_MP) && (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
36            /*
37             * We need to make sure the location we intend to put secondary core
38             * boot code is reserved and not used by any part of u-boot
39             */
40            if (gd->relocaddr > determine_mp_bootpg(NULL)) {
41                    gd->relocaddr = determine_mp_bootpg(NULL);
42                    debug("Reserving MP boot page to %08lx\n", gd->relocaddr);
43            }
44    #endif
45            return 0;
46    }

• 8번 줄의 CONFIG_SYS_MEM_RESERVE_SECURE은 정의되어 있지 않아 if문은 수행되지 않습니다.
• 28번 줄의 CONFIG_SYS_SDRAM_BASE은 0x00000000로 정의되어 있어 if문이 수행됩니다.
• 35번 줄의 if문은 수행되지 않습니다.