From 69318c29dba0cd4c58424190e0336a58548b63aa Mon Sep 17 00:00:00 2001
From: Matthew Dillon <dillon@apollo.backplane.com>
Date: Wed, 19 Aug 2015 12:23:26 -0700
Subject: [PATCH] boot - Fix CD booting

* Recent changes to move the loader's heap to high-memory broke the
  CD I/O code due to being beyond the BIOS'es segmentation range.  The
  HDD code was already using bounce buffers, but the CD code was not.

* Adjust the CD I/O code to use bounce buffers too.

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From 349c99ee28c800cca8338621e90b603e7d452adc Mon Sep 17 00:00:00 2001
From: Matthew Dillon <dillon@apollo.backplane.com>
Date: Sun, 26 Jul 2015 01:03:46 -0700
Subject: [PATCH] boot - Put loader heap in high memory

* We ran out of low BIOS memory.  The initrd.img.gz unpacking requires a
  bit more than ~32KB of temporary space and it ran the loader out of
  low-BIOS heap memory.

  This can cause the loader to fail to load the image and prevent proper
  crypto or single-user bootstrapping.

* Steal the heap from high-memory, just ender the kernel+modules load area
  limit.  For now, steal 1MB, which gives the loader plenty of space again.
  The kernel will lose 1MB of physical memory, boo-hoo.

* The loader must remove the heap from the SMAP passed to the kernel.

* Move any objects requiring VTOPSEG/VTOPOFF out of malloc and into a
  static or stack declaration.

Reported-by: cgag, multiple
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