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board_f: reserve noncached space below malloc area

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Noncached area at present is being initialized to random space after malloc
area. It works in most the cases as it goes to stack area & stack is not
overwriting it being far from it.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
This commit is contained in:
Vikas Manocha 2019-08-16 09:57:44 -07:00 committed by Tom Rini
parent 27e0f3bcf0
commit 5f7adb5b1c
1 changed files with 17 additions and 0 deletions
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17
common/board_f.c
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@ -467,12 +467,29 @@ static int reserve_uboot(void)
return 0;
}
#ifdef CONFIG_SYS_NONCACHED_MEMORY
static int reserve_noncached(void)
{
/* round down to SECTION SIZE (typicaly 1MB) limit */
gd->start_addr_sp &= ~(MMU_SECTION_SIZE - 1);
gd->start_addr_sp -= CONFIG_SYS_NONCACHED_MEMORY;
debug("Reserving %dM for noncached_alloc() at: %08lx\n",
CONFIG_SYS_NONCACHED_MEMORY >> 20, gd->start_addr_sp);
return 0;
}
#endif
/* reserve memory for malloc() area */
static int reserve_malloc(void)
{
gd->start_addr_sp = gd->start_addr_sp - TOTAL_MALLOC_LEN;
debug("Reserving %dk for malloc() at: %08lx\n",
TOTAL_MALLOC_LEN >> 10, gd->start_addr_sp);
#ifdef CONFIG_SYS_NONCACHED_MEMORY
reserve_noncached();
#endif
return 0;
}