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The panic declaration in <linux/kernel.h> is out of place and unexpected
as it's not a Linux kernel. printf() and printk() are defined in
<printk.h>, so move it there too. Most files making use of panic(), pull
it in via <common.h>, so we only need to adjust two headers for the
new location.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20220930154247.756577-1-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Now that we have reserved memory regions specially marked in the SDRAM
bank requests, we can use this information to map these regions
uncached and eXecute Never to avoid speculative access into these
regions from causing hard-to-debug data aborts.
The sequence used here is safe because __mmu_init turns off the MMU if
enabled, so even if we overwrite early MMU uncached entries they are
without effect until the MMU is turned on again, by which time the
for_each_reserved_region should have disabled caching for them again
(e.g. because they were listed in DT as /reserve-memory).
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20220817114244.1810531-7-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Record GPL-2.0-only as license for all files lacking an explicit license
statement.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20220103120539.1730644-9-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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In order to avoid passing random/junky values to DMA/HW as well as to
allow simplifying memory initialization in individual drivers, change
dma_alloc_coherent() to guarantee that memory it returns is properly
zeroed out.
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Share sanity checking code in mmu_init() as well as code to detect if
MMU is on or not on both ARM and ARM64.
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Both ARM and ARM64 implement almost identical algorithms in
dma_alloc_coherent(). Move the code to mmu-common.c, so it can be
shared.
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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