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https://github.com/brain-hackers/u-boot-brain
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2010-2012
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* Stefan Roese, DENX Software Engineering, sr@denx.de.
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*/
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#include <bootcount.h>
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#include <cpu_func.h>
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#include <asm/cache.h>
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#include <linux/compiler.h>
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#if !defined(CONFIG_DM_BOOTCOUNT)
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/* Now implement the generic default functions */
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__weak void bootcount_store(ulong a)
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{
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void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
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uintptr_t flush_start = rounddown(CONFIG_SYS_BOOTCOUNT_ADDR,
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CONFIG_SYS_CACHELINE_SIZE);
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uintptr_t flush_end;
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#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
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raw_bootcount_store(reg, (CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000) | a);
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flush_end = roundup(CONFIG_SYS_BOOTCOUNT_ADDR + 4,
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CONFIG_SYS_CACHELINE_SIZE);
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#else
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raw_bootcount_store(reg, a);
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raw_bootcount_store(reg + 4, CONFIG_SYS_BOOTCOUNT_MAGIC);
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flush_end = roundup(CONFIG_SYS_BOOTCOUNT_ADDR + 8,
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CONFIG_SYS_CACHELINE_SIZE);
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#endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD */
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flush_dcache_range(flush_start, flush_end);
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}
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__weak ulong bootcount_load(void)
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{
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void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
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#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
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u32 tmp = raw_bootcount_load(reg);
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if ((tmp & 0xffff0000) != (CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000))
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return 0;
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else
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return (tmp & 0x0000ffff);
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#else
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if (raw_bootcount_load(reg + 4) != CONFIG_SYS_BOOTCOUNT_MAGIC)
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return 0;
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else
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return raw_bootcount_load(reg);
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#endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) */
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}
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#else
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#include <dm.h>
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/*
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* struct bootcount_mem_priv - private bootcount mem driver data
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*
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* @base: base address used for bootcounter
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* @singleword: if true use only one 32 bit word for bootcounter
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*/
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struct bootcount_mem_priv {
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phys_addr_t base;
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bool singleword;
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};
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static int bootcount_mem_get(struct udevice *dev, u32 *a)
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{
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struct bootcount_mem_priv *priv = dev_get_priv(dev);
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void *reg = (void *)priv->base;
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u32 magic = CONFIG_SYS_BOOTCOUNT_MAGIC;
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if (priv->singleword) {
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u32 tmp = raw_bootcount_load(reg);
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if ((tmp & 0xffff0000) != (magic & 0xffff0000))
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return -ENODEV;
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*a = (tmp & 0x0000ffff);
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} else {
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if (raw_bootcount_load(reg + 4) != magic)
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return -ENODEV;
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*a = raw_bootcount_load(reg);
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}
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return 0;
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};
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static int bootcount_mem_set(struct udevice *dev, const u32 a)
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{
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struct bootcount_mem_priv *priv = dev_get_priv(dev);
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void *reg = (void *)priv->base;
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u32 magic = CONFIG_SYS_BOOTCOUNT_MAGIC;
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uintptr_t flush_start = rounddown(priv->base,
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CONFIG_SYS_CACHELINE_SIZE);
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uintptr_t flush_end;
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if (priv->singleword) {
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raw_bootcount_store(reg, (magic & 0xffff0000) | a);
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flush_end = roundup(priv->base + 4,
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CONFIG_SYS_CACHELINE_SIZE);
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} else {
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raw_bootcount_store(reg, a);
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raw_bootcount_store(reg + 4, magic);
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flush_end = roundup(priv->base + 8,
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CONFIG_SYS_CACHELINE_SIZE);
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}
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flush_dcache_range(flush_start, flush_end);
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return 0;
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};
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static const struct bootcount_ops bootcount_mem_ops = {
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.get = bootcount_mem_get,
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.set = bootcount_mem_set,
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};
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static int bootcount_mem_probe(struct udevice *dev)
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{
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struct bootcount_mem_priv *priv = dev_get_priv(dev);
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priv->base = (phys_addr_t)dev_read_addr(dev);
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if (dev_read_bool(dev, "single-word"))
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priv->singleword = true;
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return 0;
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}
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static const struct udevice_id bootcount_mem_ids[] = {
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{ .compatible = "u-boot,bootcount" },
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{ }
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};
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U_BOOT_DRIVER(bootcount_mem) = {
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.name = "bootcount-mem",
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.id = UCLASS_BOOTCOUNT,
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.priv_auto = sizeof(struct bootcount_mem_priv),
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.probe = bootcount_mem_probe,
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.of_match = bootcount_mem_ids,
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.ops = &bootcount_mem_ops,
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};
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#endif
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