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armv8: fsl-layerscape: Fix MC reserved memory calculation

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In case high region memory doesn't have enough space for Management
Complex (MC), the return value should indicate a failure so the
caller can handle it accordingly.

Signed-off-by: York Sun <york.sun@nxp.com>
Reported-by: Ebony Zhu <ebony.zhu@nxp.com>
This commit is contained in:
York Sun 2017-09-07 10:12:32 -07:00
parent 0e8a4264ec
commit e9303a4146
1 changed files with 12 additions and 3 deletions
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15
arch/arm/cpu/armv8/fsl-layerscape/cpu.c
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@ -619,13 +619,22 @@ void efi_reset_system_init(void)
#endif
/*
* Calculate reserved memory with given memory bank
* Return aligned memory size on success
* Return (ram_size + needed size) for failure
*/
phys_size_t board_reserve_ram_top(phys_size_t ram_size)
{
phys_size_t ram_top = ram_size;
#if defined(CONFIG_FSL_MC_ENET) && !defined(CONFIG_SPL_BUILD)
ram_top = mc_get_dram_block_size();
if (ram_top > ram_size)
return ram_size + ram_top;
ram_top = ram_size - ram_top;
/* The start address of MC reserved memory needs to be aligned. */
ram_top -= mc_get_dram_block_size();
ram_top &= ~(CONFIG_SYS_MC_RSV_MEM_ALIGN - 1);
#endif
@ -669,8 +678,8 @@ phys_size_t get_effective_memsize(void)
/* Check if we have enough memory for MC */
if (rem < board_reserve_ram_top(rem)) {
/* Not enough memory in high region to reserve */
if (ea_size > board_reserve_ram_top(rem))
ea_size -= board_reserve_ram_top(rem);
if (ea_size > board_reserve_ram_top(ea_size))
ea_size -= board_reserve_ram_top(ea_size);
else
printf("Error: No enough space for reserved memory.\n");
}