/*******************************************************************************
* Perform any BL1 specific platform actions.
******************************************************************************/
void bl1_early_platform_setup(void)
{
const unsigned long bl1_ram_base = BL1_RAM_BASE;
const unsigned long bl1_ram_limit = BL1_RAM_LIMIT;
const unsigned long tzram_limit = TZRAM_BASE + TZRAM_SIZE;
/*
* Calculate how much ram is BL1 using & how much remains free.
* This also includes a rudimentary mechanism to detect whether
* the BL1 data is loaded at the top or bottom of memory.
* TODO: add support for discontigous chunks of free ram if
* needed. Might need dynamic memory allocation support
* et al.
*/
bl1_tzram_layout.total_base = TZRAM_BASE;
bl1_tzram_layout.total_size = TZRAM_SIZE;
if (bl1_ram_limit == tzram_limit) {
/* BL1 has been loaded at the top of memory. */
bl1_tzram_layout.free_base = TZRAM_BASE;
bl1_tzram_layout.free_size = bl1_ram_base - TZRAM_BASE;
} else {
/* BL1 has been loaded at the bottom of memory. */
bl1_tzram_layout.free_base = bl1_ram_limit;
bl1_tzram_layout.free_size =
tzram_limit - bl1_ram_limit;
}
/* Initialize the platform config for future decision making */
platform_config_setup();
}
/*******************************************************************************
* Perform any BL31 specific platform actions. Here is an opportunity to copy
* parameters passed by the calling EL (S-EL1 in BL2 & S-EL3 in BL1) before they
* are lost (potentially). This needs to be done before the MMU is initialized
* so that the memory layout can be used while creating page tables. On the FVP
* we know that BL2 has populated the parameters in secure DRAM. So we just use
* the reference passed in 'from_bl2' instead of copying. The 'data' parameter
* is not used since all the information is contained in 'from_bl2'. Also, BL2
* has flushed this information to memory, so we are guaranteed to pick up good
* data
******************************************************************************/
void bl31_early_platform_setup(bl31_args *from_bl2,
void *data)
{
bl2_to_bl31_args = from_bl2;
/* Initialize the platform config for future decision making */
platform_config_setup();
console_init(PL011_UART0_BASE);
}
/*******************************************************************************
* Perform any BL31 specific platform actions. Here is an opportunity to copy
* parameters passed by the calling EL (S-EL1 in BL2 & S-EL3 in BL1) before they
* are lost (potentially). This needs to be done before the MMU is initialized
* so that the memory layout can be used while creating page tables. On the FVP
* we know that BL2 has populated the parameters in secure DRAM. So we just use
* the reference passed in 'from_bl2' instead of copying. The 'data' parameter
* is not used since all the information is contained in 'from_bl2'. Also, BL2
* has flushed this information to memory, so we are guaranteed to pick up good
* data
******************************************************************************/
void bl31_early_platform_setup(bl31_args_t *from_bl2,
void *data)
{
bl2_to_bl31_args = from_bl2;
/* Initialize the console to provide early debug support */
console_init(PL011_UART0_BASE);
/* Initialize the platform config for future decision making */
platform_config_setup();
}
/*******************************************************************************
* BL1 has passed the extents of the trusted SRAM that should be visible to BL2
* in x0. This memory layout is sitting at the base of the free trusted SRAM.
* Copy it to a safe loaction before its reclaimed by later BL2 functionality.
******************************************************************************/
void bl2_early_platform_setup(meminfo_t *mem_layout,
void *data)
{
/* Initialize the console to provide early debug support */
console_init(PL011_UART0_BASE);
/* Setup the BL2 memory layout */
bl2_tzram_layout.total_base = mem_layout->total_base;
bl2_tzram_layout.total_size = mem_layout->total_size;
bl2_tzram_layout.free_base = mem_layout->free_base;
bl2_tzram_layout.free_size = mem_layout->free_size;
bl2_tzram_layout.attr = mem_layout->attr;
bl2_tzram_layout.next = 0;
/* Initialize the platform config for future decision making */
platform_config_setup();
}