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fel: add support for Allwinner A133

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The Allwinner A133 is a slightly older SoC (around 2020) with four
Cortex-A53 cores, sharing many treats with the H6.
The A100 and R818 are reportedly the same chip, just in different bins
or packaging.
The chip has only 16K of SRAM-A1, but this is immediately followed by
128K of SRAM-C, with later 64K of SRAM-A2, after some gap.
The BootROM SRAM usage is similar to other SoCs: there is the IRQ stack
growing down from a 5K offset in SRAM A1, and probably some buffers
located towards the end of SRAM C. We can use the area just before those
buffers for the IRQ stack backup, which gives us a nice contiguous 128K
SRAM area for any payloads.

This setup is known to boot the WIP mainline U-Boot setup, including
some placeholder TF-A port for now. SPL execution, including returning
back to the BROM, works, also the 64-bit switch, as well as the SID
dump.

Signed-off-by: Andre Przywara <osp@andrep.de>
This commit is contained in:
Andre Przywara 2022-12-06 23:03:52 +00:00 committed by Paul Kocialkowski
parent 4390ca668f
commit 02353e9ae4
1 changed files with 19 additions and 0 deletions
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19
soc_info.c
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@ -151,6 +151,11 @@ sram_swap_buffers h616_sram_swap_buffers[] = {
{ .size = 0 } /* End of the table */
};
sram_swap_buffers a133_sram_swap_buffers[] = {
{ .buf1 = 0x21000, .buf2 = 0x40000, .size = 0x400 },
{ .size = 0 } /* End of the table */
};
/*
* R329 has no SRAM A1, but a huge SRAM A2 at 0x100000. SPL and BROM uses
* this SRAM A2's first part like how other SoCs use SRAM A1. The sp and
@ -623,6 +628,20 @@ soc_info_t soc_info_table[] = {
.rvbar_reg = 0x08000040,
.icache_fix = true,
.watchdog = &wd_a523_compat,
},{
.soc_id = 0x1855, /* Allwinner A133 */
.name = "A133",
.spl_addr = 0x20000,
.scratch_addr = 0x21000,
.thunk_addr = 0x40400, .thunk_size = 0x200,
.swap_buffers = a133_sram_swap_buffers,
.sram_size = 148 * 1024,
.sid_base = 0x03006000,
.sid_offset = 0x200,
.sid_sections = generic_2k_sid_maps,
.rvbar_reg = 0x08100040,
.needs_smc_workaround_if_zero_word_at_addr = 0x100004,
.watchdog = &wd_h6_compat,
},{
.swap_buffers = NULL /* End of the table */
}